AN_004_RMU900+推荐输出功率

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pm900参数

pm900参数摘要：一、引言二、PM900参数概述1.产品定位2.主要特性三、PM900技术参数1.基本参数1.尺寸2.重量3.材质2.性能参数1.电源2.续航3.处理器4.存储5.显示3.功能参数1.导航2.定位3.通信4.娱乐5.安全四、PM900适用场景1.个人出行2.户外运动3.商务应用4.教育学习五、结论正文：一、引言随着科技的飞速发展，智能产品日益普及，PM900应运而生。

作为一款集多种功能于一身的设备，PM900凭借其出色的性能和实用性，受到了广泛关注。

本文将详细介绍PM900的参数特点，帮助大家更好地了解这款产品。

二、PM900参数概述1.产品定位PM900定位为一款高性能、多功能、易用的智能设备，适用于各种场景。

无论是户外探险，还是商务办公，PM900都能满足用户需求。

2.主要特性PM900具有强大的性能和丰富的功能，其主要特性如下：（1）高性能处理器，确保设备运行流畅；（2）大容量存储，满足用户多场景应用需求；（3）高清晰度显示，带来出色的视觉体验；（4）长续航能力，满足用户长时间使用需求；（5）多功能导航，为用户提供便捷的出行指引。

三、PM900技术参数1.基本参数（1）尺寸：PM900采用适中的尺寸设计，便于携带和握持；（2）重量：设备轻巧，减轻用户携带负担；（3）材质：采用高品质材料，确保设备耐用性。

2.性能参数（1）电源：PM900配备高效充电器，快速充电，无需长时间等待；（2）续航：设备具备长续航能力，满足用户长时间使用需求；（3）处理器：采用高性能处理器，保证设备运行流畅；（4）存储：大容量存储，支持多种应用和文件存储；（5）显示：高清晰度显示，呈现清晰、细腻的画质。

3.功能参数（1）导航：内置多功能导航系统，为用户提供精准的出行指引；（2）定位：支持多种定位方式，实现精准定位；（3）通信：具备良好的通信能力，满足用户通话需求；（4）娱乐：支持多种娱乐功能，如音乐、视频等，丰富用户休闲时光；（5）安全：设置多重安全防护措施，保障用户数据和隐私安全。

随身听相关指南

仅以此文献给随身听爱好者随身听指南2002年12月作者：公鸡先生说明：本文全部摘自网上，转载需注明原作者关于现在的CD随身听音质不如老产品的一点感想 (5)老机王VS新机王, 老话再提: D-777 VS D-EJ01 (5)哪里可以找到D777的资料？ (6)sony 经典的顶级 WLAKMAN ：WM-EX1、3、5、7、9 、20 (7):!!!!!!!!!!!!!!来看！！！！！！！！！！！！ (10)不比不知道！KSC35真让我。

(12)听了拜亚动力431后，我一直引以为豪的sony888被打的没影了。

(12)我在这里看了好几天贴子，发现对我自己选购耳机一点帮助也没有，越看越晕！！！！ (12)koss ksc35 和 sony mdr-v300 (13)耳机里之三大真理 (13)其貌不扬的panasonic一脚踩扁一个777esp版（d-e900） (16)随身听耳机的秘密（转贴）大家看看就好：） (20)谈随身听 (22)贴一篇吹捧D-303的文章！ (26)CD walkman的误区！ (26)谈谈我对这里的一点看法 (27)关于随身听，功率，音质 (28)关于对许多人对耳机的看法的看法 (28)随身听的发烧耳机配置综述（米饭在清华BBS上扫盲的） (28)为什么要买耳机（转贴）！ (29)妙不可言的耳机 (36)前天买了G73，有惊无险 (37)漫谈随身听收藏。

初次尝试写这类文章，收藏也不是很多，文章疏漏肯定很多，欢迎拍砖。

(38)再谈303和555！ (40)继续讨论741耳塞的音质问题——741和848/838的比较 (40)！！！！！火星撞地球！！！！！恐怖的老机对决！！！！！什么才是最强？！？！？ (41)D150 、D303、D777、D335、XPS900等机器的试听感受 (42)极品对极品，顶级对顶级！ 75 对 7 (43)SX75使用记 (44)我的看法想法（不要删！！！） (45)CT570与CT780音质的比较 (45)请问松下S450CD随身听怎么样 (46)Panasonic的sl-sx510如何？有熟悉的兄弟说说看 (47)向对日产耳塞持有偏见的朋友进一言 (47)非主流民用级随身听耳机选购指南 (49)公认超强低音大比拼 (52)完整版主流MD随身听耳塞搭配 (54)常见的随身听音效简介 (57)AIWA极品耳机HP—V743、HP—J9完全对比报告 (58)耳机名器榜：心动耳机TOP10推荐 (59)浅谈耳机购买要点分析 (63)随身听耳机导购指南（上） (64)随身听耳机导购指南（中） (66)随身听耳机导购指南（下） (69)奸商的小秘密耳机真假浅谈 (70)数码随身听商家不正当谋利手段大揭露 (71)市面常见索尼耳机选购入门(上) (73)市面常见索尼耳机选购入门(下) (75)SONY EJ955 印象 (76)SONY常见耳塞入门 (77)随身听的新趋势是MP3还是MP3-CD (78)十五款常见内耳式耳机试听感受 (80)海印小行情！ (81)国产随身听离我们有多远 (82)随身听：迷雾重重说进口 (84)CD随身听辨假购机攻略 (86)论行货水货随身听选购 (88)商场现形记 (90)选购一副适合自己的随身听耳塞 (91)随身听耳机的秘密 (97)教你几招----细选一副好耳机 (98)购机“五法” (99)discman大比拼 (105)鉴别随身听四法 (109)随身听的选择 (110)耳听为凭，什么才是好声 (112)怎样鉴别进口随身听的产地和品质 (113)1992——2000年AIWA耳塞全记录 (116)今天真爽啊,逛百脑汇淘到了我一直寻觅已久的V553 (121)AIWA V553没有传说中的那么好！！！ (121)借尸还魂！让AIWIA V553起死回生！！！ (122)少量爱华HP-V543到货！ (124)谈谈耳机的声场再现 (125)真假爱华HP-V553耳机大揭秘 (126)肖先生（原创工程师）谈CD机1BT与多BT（摘录） (129)最终还是决定卖了，老机+耳塞。

CMU200 说明书

保留为以后扩展用仪表设置打印
值可变按键和组选择：转动旋钮
在输入域可变值，表中选择参数以及下拉菜单的选择。可用于扩大或压缩表，按下表示对所选内容的确认。在下拉菜单中选择中光标垂直移动在下拉菜单中选择中光标水平移动
垂直光标键
水平光标键
Further Keys 退出下拉菜单，关闭编辑框，取消确认。测试模式跟待机模式的切换
2 软件升级和版本管理
如果用户选择了“Activate other software”那么会出现如下界面：
例如，如果用户选中了 “base 2X10.N03” 那么这一项就会显示红色，如果用户点击 “Activate” 相关的热键，那么 CMU 就会自动完成安装。如果用户选择了“Delete Software”那么会出现如下界面：
COMTEST 共 65 页
－ 7 －
CMU200 操作手册
存储器上的启动配置。如果 CMU 检测到软驱或 PCMCIA 插槽里的存储介质上有 CMU 固件的安装版本，那么在启动的时候版本管理器会自动的打开。版本管理器的主界面如下图：
如果用户要用不同的功能可以使用相应的软键激活。但是需要注意，如果这台 CMU 上只存在一个软件版本的配置，那么激活其它软件属性的功能就失效。
CMU200 操作手册
CMU200 操作手册
COMTEST
共 65 页
－ 1 －
CMU200 操作手册
目
录
第一章CMU200 简述 ......................................................................................................................3 一 CMU200 应用及其基本功能 .................................................................................................3 二 CMU200 的主要优点 .............................................................................................................3 三 CMU200 的按键及接口 .........................................................................................................3 1 CMU版本管理器 ...................................................................................................................7 2 软件升级和版本管理 ...........................................................................................................8 第二章信令模式下移动台测试操作...........................................................................................13 一二三四五六 CMU的 5 钟信令状态 ..........................................................................................................13 移动台测试前的准备 ...........................................................................................................17 GSM900 OVERVIEW ..............................................................................................................23 GSM900 POWER 测试 ..........................................................................................................29 GSM900 MODULATION测试 .................................................................................................45 GSM900 SPECTRUM测试 ......................................................................................................50 1 Modulation GMSK调制谱 ...................................................................................................50 2 Switching GMSK ..................................................................................................................54 七 GSM900 Receive Quality测试 ..........................................................................................57

蜚声功放说明书

4. 信号指示灯此指示灯指示该通道的输出电平，亮度随输出电平幅度的大小变化而变化。
5. 安装孔用于安装到机柜时固定用。
6. 通道1的音量控制器功放工作于立体声或并接模式时由此控制器控制通道1的输出电平，功放工作于桥接模式时由此控制器控制输出电平，此时通道2的音量控制器失效。
7. 保护指示当此指示灯亮，处于保护状态，方便找出问题所在。指示的保护功能有：削峰压限保护、过热保护、过载保护、短路保护、直流保护功能。
11电压增益频率响应总谐波失真转换速率阻尼系数动态范围信噪比输入灵敏度输入阻抗平衡不平衡输出级电路类型保护功能高通滤波器低通滤波器散热气流方向输入电压频率外箱尺寸mm重量压限直流短路开关机零冲击开机软启动vhf甚高频保护压限直流短路开关机零冲击开机软启动从功放面板进风23kg29kg29kg33kg35kg38kg33kgl620xw585xh210max1200max2400max3600max4300max7200max7800650wx21250wx2450wx2675wx2800wx2975wx21650wx21950wx2520wx2450wx2300wx21100wx2max4800830wx21250wx2900w1350w1600w1950w3300w3900w2500w620wx21000wx21200wx21400wx22160wx22700wx21850wx2桥接功率1240w2000w2400w2800w43200w5400w3700wmax系列技术参数12注意
2. TRS输入座(平衡或不平衡)。连接到上一级的周边处理设备。 3. 直通插座
与XLR 输入并联，提供一个与输入信号一样的输出信号，用此平衡插座连接到另一台设备。（仅限于MAX4300、MAX4800、MAX7200、MAX7800） 4. 输入灵敏度开关此开关用于选择功放的输入灵敏度：0.775V、1.0V及1.4V。(仅限于MAX4300、MAX4800、MAX7200、 MAX7800）。 5. 工作模式选择开关用此开关去选择功放的工作模式： STEREO/立体声：两个通道完全独立。 PARALLEL/并接：信号共用通道1输入，音量独立控制，输出独立。 BRIDGE/桥接：信号共用通道1输入，音量由通道1控制，输出接通道1的SPEAKON。当使用到该工作模式时，背板的指示灯亮。注意：具体见下页的接线图。 6. 150Hz低通滤波器开关若系统中需要推动超低音的音箱时，将开关拨到“ON”的位置可以滤掉150Hz以上的信号，直接使用功放推动超低音的音箱，无需外加电子分频器。(仅限于MAX4300、MAX4800、MAX7200、MAX7800) 7. 音箱螺旋座输出这是功放螺旋座的输出端。1+接喇叭的正端，1-接喇叭的负端，桥接时1+接喇叭的正端、2+接喇叭的负端。 8. 喇叭接线柱输出这是功放喇叭接线柱的输出端。红色接喇叭的正端，黑色接喇叭的负端，桥接时只使用红色接喇叭的正端。 9. 保险管座此保险管座内装由标准规格的保险管，用于故障时保护功放，如果功放已经接上电源待机指示灯没有点亮时，请检查保险管的情况，如发现保险管已熔掉，在故障排除后，必须更换同一规格的保险管。 10. 散热的气流入口，不要有任何东西堵住。

RM009中文资料

GSM VBSLMAX
—
DCS VBSHMIN
—
0.5
V
2.0
V
2
Skyworks Solutions, Inc. Proprietary
101258B
July 26, 2002
元器件交易网
RM009
Power Amplifier Module for Dual-band GSM900 DCS1800 Applications
RF input and output ports are internally matched to 50 Ω to reduce the number of external components for a dual-band design. Switching circuitry receives the band select signal on the band select pin (BS) to switch between GSM (logic 0) and DCS (logic 1). Analog Power Control (APC) controls the output power of each PA selected by the band select signal. The extremely low leakage current (2 µA, typical) of the RM009 dual-band module maximizes handset standby time.
Electrical Specifications
Table 1 provides the absolute maximum ratings of the RM009, Table 2 shows the recommended operating conditions and Table 3 shows the electrical characteristics.

AN_005_RMU900模块功耗说明

RMU900读写器模块功耗说明1. 前言为了使客户更加灵活的使用RMU900读写器模块，RMU900读写器模块采用了先进的功率软件可调技术，读写器输出功率10~30dBm可调，步进精度为1dB。

随着输出功率的增加，必然导致RMU900读写器模块的功耗的增大。

为了方便用户利用RMU900读写器模块进行二次开发，本文档详细描述RMU900读写器模块在不同输出功率下的功耗。

2. RMU900功耗说明RMU900的静态工作电流为120mA。

RMU900电流随输出功率变化如Figure 2.1所示，功率消耗随输出功率变化如Table 2.1所示。

[注]本文所述电流变化、功率消耗均在当输出端口外接50欧姆标准电阻条件下测得，当外接天线时，功率消耗随天线驻波比变化，与本文描述有所差别。

Figure 2.1 电流随功率变化曲线RMU900读写器模块功耗说明Table 2.1 RMU900功率消耗与输出功率对应表输出功率（dBm） Vcc(V) I(A) 功率消耗（W）10 3.2640.230.7507211 3.2640.230.7507212 3.2640.240.7833613 3.2640.250.81614 3.2640.270.8812815 3.2640.280.9139216 3.2640.30.979217 3.2640.31 1.0118418 3.2640.34 1.1097619 3.2640.36 1.1750420 3.2640.38 1.2403221 3.2640.42 1.3708822 3.2640.45 1.468823 3.2640.48 1.5667224 3.2640.54 1.7625625 3.2640.58 1.8931226 3.2540.64 2.0825627 3.2540.77 2.5055828 3.2540.85 2.765929 3.2540.95 3.091330 3.2540.96 3.12384。

请问高中生想要记录生活买千元相机有什么推荐吗!？

高中生想要记录生活买千元相机有什么推荐吗！在现代社会，随着科技的不断发展，摄影已经成为了人们记录生活的一种重要方式。

对于高中生来说，购买一台千元相机是一个不错的选择，既能满足摄影的需求，又不会过于昂贵。

那么，对于高中生来说，买千元相机有哪些推荐呢？接下来，我将为大家介绍几款适合高中生的千元相机。

对于初学者来说，佳能EOS M50是一款不错的选择。

这款相机搭载了2400万像素的APS-C画幅CMOS传感器，能够拍摄出清晰、细腻的照片。

它还支持4K视频拍摄，能够记录下高清的生活瞬间。

佳能EOS M50还具备Wi-Fi和蓝牙功能，方便用户进行照片的传输和分享。

对于高中生来说，这款相机不仅价格适中，而且操作简单，非常适合初学者使用。

索尼A6000也是一款值得推荐的相机。

这款相机采用了2430万像素的APS-C画幅CMOS传感器，能够拍摄出高质量的照片。

它还配备了179个相位检测自动对焦点，能够快速、准确地对焦。

索尼A6000还支持高速连拍，最高可达每秒11帧，能够捕捉到更多的精彩瞬间。

这款相机还具备Wi-Fi和NFC功能，方便用户进行照片的传输和分享。

对于高中生来说，索尼A6000不仅拍照效果出色，而且携带方便，非常适合记录生活。

富士X-T200也是一款不错的选择。

这款相机采用了2420万像素的APS-C画幅CMOS传感器，能够拍摄出细腻、真实的照片。

它还配备了425个相位检测自动对焦点，能够快速、准确地对焦。

富士X-T200还支持4K视频拍摄，能够记录下高清的生活瞬间。

这款相机还具备倾斜式触摸屏，方便用户进行自拍和拍摄。

对于高中生来说，富士X-T200不仅外观时尚，而且性能出色，非常适合记录生活。

对于高中生来说，购买一台千元相机是一个不错的选择。

佳能EOS M50、索尼A6000和富士X-T200都是几款适合高中生的千元相机。

它们不仅价格适中，而且拍摄效果出色，非常适合记录生活。

希望以上的推荐能够帮助到有需要的高中生，让他们能够更好地记录下美好的生活瞬间。

900M技术参数

一：900M性能讲解1：读写器在下列环境条件下应能正常工作环境温度：-20℃～70℃；平均相对湿度：不大于95%（+25℃）；2：读标签方式通过自动感应方式读标签。

具体读卡方式有：自动连续读卡、触发读卡、定时读卡、控制读卡、3：读标签距离读标签的距离达到10—15m。

4：读取标签协议符合ISO18000-6B，EPC Gen2协议的所有标签均可被识读。

5：标签读写时间读：<12ms。

写：<31ms。

6：具防冲撞功能能够一次性识别多张标签，60张卡/秒7：天线数量两路天线。

（目前只支持两个天线）8：射频工作频率符合ISO/IEC 18000-6标准及中国无线电管理规则。

工作频率范围：902～928MHz。

目前我们国家给定的范围为：920.5M——924.5M。

9：频率误差误差范围≤±150KHz。

（此问题细讲比较深入，如果有客户问可告诉他数值，如果客户问的比较仔细可以转到研发，让研发来具体解答）10：射频工作方式以广谱跳频（FHSS）或定频方式。

（防干扰，在一频率读卡出现干扰时自动跳频到其他频道读卡，从而避免干扰）11：射频输出功率输出功率在15dBm～32dBm之间可调。

（调整通过上位机软件进行调整）12：供电方式及工作电压供电电源为9V，12V的直流电源。

工作电压在9V-12V。

当电池电压在标称值±5%范围内时，读写器应工作正常。

13：工作电流及功耗将射频功率开到最大，最大工作电流<1.5A；不开射频，最小工作电流<0.5A。

工作功耗：最大功耗≤12W。

14：串口通讯（读卡器和道闸间距离）RS232通讯符合EIA-RS232标准。

串口波特率可调，默认为：115200bps，RS232通讯距离15米RS485通讯符合EIA-RS485标准。

波特率可选9600bps、19200bps、115200bps，传输距离可达1200m。

15：网线口通讯符合标准。

最适合影音娱乐的CPU排行榜

最适合影音娱乐的CPU排行榜在如今数字娱乐充斥着我们的生活的时代，电影、音乐、游戏等娱乐形式已经成为人们日常生活的重要组成部分。

然而，要享受高质量的影音娱乐体验，一个强大的中央处理器（CPU）是不可或缺的。

本文将介绍目前市场上最适合影音娱乐的CPU排行榜。

第一名：Intel Core i9-9900K作为Intel旗下的顶级处理器，i9-9900K无疑是目前最适合影音娱乐的选择之一。

该CPU采用了8核16线程的设计，具备高达5.0GHz的超频能力，能够处理多线程任务和高负荷的娱乐软件。

此外，它还搭载了Intel® UHD Graphics 630集成显卡，提供出色的图形性能，可流畅运行高分辨率影片和游戏。

第二名：AMD Ryzen 7 3800XAMD Ryzen系列处理器一直以其出色的性价比和多线程性能而闻名。

Ryzen 7 3800X是其最新推出的产品之一。

这款处理器具备8核16线程的规格，主频可达到4.5GHz，并采用了7nm制程工艺，提供更高的能效和性能。

此外，它还搭载了AMD Radeon™ RX Vega 8集成显卡，为用户带来更出色的娱乐体验。

第三名：Intel Core i7-9700Ki7-9700K是Intel第9代酷睿系列中的一员，是一款出色的影音娱乐处理器。

它拥有8核8线程的规格，并支持超频，主频可以达到4.9GHz。

此外，它还搭载了Intel® UHD Graphics 630集成显卡，提供流畅的影音播放和游戏体验。

第四名：AMD Ryzen 5 3600Ryzen 5 3600是AMD Ryzen系列中的一款中端处理器，适合一般影音娱乐需求。

它拥有6核12线程的设计，主频可达到4.2GHz。

该处理器采用了7nm Zen 2架构，性能表现卓越，能够满足大多数用户的需求。

第五名：Intel Core i5-9400Fi5-9400F是Intel酷睿系列中的一款入门级处理器，价格亲民，适合预算有限的用户。

AN_001_RMU900+天线选择

RMU900+模块天线选择
无源UHF读卡器工作的模式要求读卡器在接收信号的时候同时还要打开功放提供给标签能量，因此将会有一个强信号泄漏到接收端。

假设天线端口驻波比为 1.5，根据公式S11=10log[(VSWR-1)/ (VSWR+1)]，可得到S11= -7dB，如果发射功率为30dBm(1W)，那么发射信号经过环行器修漏到接收端的信号大小为23dBm，这个信号将同天线接收到的有用信号一起进入接收端，而23dBm 的强信号经过衰减后将刚好达到接收端混频器的输入1dB压缩点。

所以如果天线端口的驻波比大于1.5，那么反射回来的信号将会大于23dBm，从而超过混频器的1dB压缩点而阻塞接收机。

因此在选择天线的时候，要选择驻波比小于1.5的天线，这样才能保证在输出功率足够的时候，接收机能够正常工作。

本模块要求天线端口阻抗匹配到50欧姆，驻波比要小于1.5。

表1标出了不同功率下，配合不同增益的天线所测得的读卡距离（根据所读卡的不同，读卡距离可能有所不同）
表1 读卡距离VS 天线增益&输出功率。

pm900参数

PM900参数1. 介绍PM900是一种参数，用于描述特定设备或系统的性能和功能。

它可以包含各种信息，如设备的规格、功能、性能指标等。

在不同的领域和行业中，PM900参数可以有不同的定义和用途。

2. PM900参数的作用PM900参数可以提供关于设备或系统性能的详细信息，帮助用户更好地了解和使用该设备。

以下是一些常见的作用：2.1 设备选型PM900参数可以帮助用户在购买设备时做出明智的选择。

通过比较不同设备的参数，用户可以确定哪种设备最适合他们的需求。

例如，在购买电视时，用户可以比较不同品牌和型号的PM900参数（如分辨率、对比度、刷新率等），以选择最适合自己观看需求的电视。

2.2 性能评估PM900参数还可以用于评估设备或系统的性能。

通过对比实际性能与PM900参数之间的差异，用户可以判断设备是否达到了预期性能水平。

例如，在计算机领域，CPU频率是一个重要的PM900参数之一。

用户可以通过测试CPU运行速度来验证其实际性能是否与频率相符。

2.3 故障排查当设备或系统出现故障时，PM900参数可以作为排查问题的参考。

通过对比故障前后的PM900参数，用户可以确定是否有任何变化可能导致了故障。

例如，在网络领域，带宽是一个重要的PM900参数。

当网络速度变慢时，用户可以检查带宽是否符合预期，以确定问题所在。

3. PM900参数的常见类型3.1 技术参数技术参数是描述设备或系统技术特性的PM900参数。

它们通常包括规格、尺寸、重量、功耗等信息。

例如，在手机领域，屏幕尺寸、摄像头像素等都是常见的技术参数。

3.2 性能指标性能指标是描述设备或系统性能水平的PM900参数。

它们可以包括处理速度、响应时间、效率等信息。

例如，在汽车领域，加速度和最高速度是评估汽车性能的常见指标。

3.3 功能描述功能描述是描述设备或系统功能特点的PM900参数。

它们通常包括各种功能模式、操作方式等信息。

例如，在相机领域，不同模式（如自动模式、手动模式）和各种拍摄效果都是常见的功能描述参数。

UltraCam系列航空摄影测量相机介绍

UltraCam 数码航摄仪系列产品蓝皮书
北京四维空间数码科技有限公司
-1-
目录
Microsoft Vexcel 简介 ............................................................................................ 错误!未定义书签。
概述.................................................................................................................................................... 39 UltraMap 技术特点 ........................................................................................................................... 40
UltraCamXp WA (wide-angle) 广角大幅面数码航摄仪 .................................................................. 20
概述.................................................................................................................................................... 20 UltraCamXp WA ............................................................................................................................... 21 特性.................................................................................................................................................... 21 UltraCamXp WA 技术参数............................................................................................................... 21 UltraCamXp WA 影像产品展示....................................................................................................... 24

优品相机电池型号匹配表

FP90 FS11/12 FS21/22 PSP 110 PSP110厚 PSP-S110 SET
型号同 FS11/FS100/HF100/HF10/HF11/HF200/HG20/S21/S20/S200/FS37/FS36/FS306/M31/M300 FS11/FS100/HF100/HF10/HF11/HF200/HG20/ FS22/FS21 PSP1000K 不适用于新版 PSP1000K 不适用于新版仅供PSP2000
优品相机电池型号匹配表
品牌型号 BN1 NP-FW50 FV50 SONY索尼:T99 TX9 TX7C TX5 WX5C 匹配相机型号 W390 W380 NEX-5C/NEX-3Cv/A33/A55 HDR-XR550E XR350E XR150E CX550E CX350E CX150 H系列电池的摄像机 HDR-CX150E HDR-CX350E HDR-CX550E HDR-XR150E HDR-XR350E HDR-XR550E HDR-SR68E DCR-SX43E DCR-SX63E DCR-SX83E HDR-XR550E/CX550E/HDR-XR520E/XR500E/CX150E/CX350E/XR150E/XR350E HDR-CX150E HDR-CX350E HDR-CX550E HDR-XR150E HDR-XR350E HDR-XR500E HDR-XR520E HDR-XR550E DCR-SR68E DCR-SX43E DCR-SX63E DCR-SX83E DSC-W30 DSC-W30L DSC-W30S DSC-W30W DSC-W35 DSC-W40 DSC-W50 DSC-W50B DSC-W50S DSC-W55 DSC-W55/B DSC-W55/L DSC-W55/P DSC-W70 DSC-W70B DSC-W70S DSC-W80 DSC-W80/B DSC-W80/P DSC-W80/W DSC-W80S DSC-W85 DSC-W90 DSC-W90/B DSC-W90S DSC-W100 DSC-W100B DSC-W100S DSC-W110 DSC-W115 DSC-W120 DSC-W125 DSC-W130 DSC-W150 DSC-W170 DSC-W200 DSC-W210 DSC-W220 DSC-W230 DSC-W24 DSC-W270 DSC-W290 DSC-N1 DSC-N DSC-T20 DSC-T20/W DSC-T25 DSC-W180 W190 S750 S780 S950 S980 DSC-T200 T300 T500 T700 T900 T2 T70 T75 T77 T90 S930 G3 TX1 SONY索尼:T10，T9 ，T5，T3，索尼NP-FR1/DSC-T30/DSCSONY索尼 DCR-SR40E,DCR-SR60E,DCR-SR80E,DCR-HC85E,DCR-HC40E,DCR-HC20/30E,DCR-DVD602E,DCRDVD653E,DCR-DVD703E,DCR-DVD803E,DCR-HC21E,DCR-HC33E,DCR-HC43E TRV1/TRV3/200/300/3000/500/517/910/V119/V15/V25/820E/900E/2000E/320E/520E/720E/820E/618E /250E/VX2100E/PD150P/100P/190P/GV-A700/GV-D800/FD85/FD75/FD81/CCDSC5/SC55/TR3/FX1E/190P/DCRTRV9E/46E/49E/66E/67E/87E/98E/110E/120E/130E/210E/310E/317E/410E/420E/900E/940E/950E/TRV 33E/NP500/V115/610E/710E/HVR-Z1C/HVR-V1C/FX7E TRV1/TRV3/200/300/3000/500/517/910/V119/V15/V25/820E/900E/2000E/320E/520E/720E/820E/618E /250E/VX2100E/PD150P/100P/190P/GV-A700/GV-D800/FD85/FD75/FD81/CCDSC5/SC55/TR3/FX1E/190P/DCRTRV9E/46E/49E/66E/67E/87E/98E/110E/120E/130E/210E/310E/317E/410E/420E/900E/940E/950E/TRV 33E/NP500/V115/610E/710E/HVR-Z1C/HVR-V1C/FX7E DSC-F77/DSC-FX77/DSC-P2/DSC-P3/DSC-P5/DSC-P7/DSC-P8/DSC-P9/DSC-P10/DSC-V1/DCR-PC9E/DCRDCRSR300E/SR200E/SR82E/SR62E/SR42E/SR48E/SR8E/SR220E/SR85E/SR65E/SR46E/SR45E/SR908E/SR52E/S R54E/708E/CX7E/CX5E/CX6E HDR-SR12E/11E/10 CX100/DCR-DVD850/DCR-DVD650/HDR-XR520V/HDR-XR500V/HDR-XR200V/HDR-XR100/HX1

柯尼卡美能达bizhub C250_C252维修手册中文

柯尼卡美能达bizhub C250_C252维修手册中文2006.122006.12Ver. 3.0Ver. 3.02006.12 Ver. 3.02006.12 Ver. 3.0?? 2006 ?? 2006DD4038PC3-0800DD4038PC3-0800G4G4i现场维修总目录安全和重要警告事项 ..................................................................... ....................................S-1重要注意事项 ..................................................................... .........................................S-1危险事项、警告和注意的描述 ..................................................................... ................S-1安全警告 ..................................................................... ................................................S-2机器上的警告标识 ..................................................................... ................................S-18当发生意外时采取的措施 ..................................................................... ..........................S-20维修手册的构成 ..................................................................... ..........................................C-1维修手册的注释 ................................................................. ..............................................C-2bizhubC250/C252 主机概述.................................................................. ...............................................................1维修...................................................................... ...........................................................9调整/设置...................................................................... .............................................169故障排除...................................................................... ...............................................397附标准录...................................................................... .......................................................517控制器概述.................................................................. ...............................................................1维修...................................................................... ...........................................................3调整/设置...................................................................... ...............................................37故障排除...................................................................... .................................................39DF-601概述...................................................................... ...........................................................1维修...................................................................... ...........................................................5调整/设置.....................................................................................................................13故障排除...................................................................... .................................................29PC-103/PC-203概述.................................................................. ...............................................................1维修...................................................................... ...........................................................3调整/设置...................................................................... ...............................................13故障排除...................................................................... .................................................19PC-403概述...................................................................... ...........................................................1维修...................................................................... ...........................................................3调整/设置...................................................................... ...............................................17故障排除...................................................................... .................................................25bizhubC250_FS_Total_E TOC.fm Page i Friday January 5 2007 4:11 PMiiAD-503概述...................................................................... ..........................................................1维修...................................................................... ..........................................................3调整/设置...................................................................... ................................................7故障排除...................................................................... .................................................11FS-501概述...................................................................... ..........................................................1维修.................................................................. ..............................................................5调整/设置...................................................................... ................................................9故障排除...................................................................... .................................................19FS-514/PK-510/OT-601概述.................................................................. ..............................................................1维修...................................................................... ..........................................................7调整/设置...................................................................... ..............................................45故障排除...................................................................... .................................................59MT-501 概述...................................................................... ..........................................................1维修...................................................................... ..........................................................3调整/设置...................................................................... ................................................7故障排除...................................................................... .................................................13SD-503概述...................................................................... ..........................................................1维/修...................................................................... ..........................................................3调整设置...................................................................... ..............................................25故障排除...................................................................... .................................................37FS-603概述...................................................................... ..........................................................1维修...................................................................... ..........................................................5调整/设置...................................................................... ..............................................23故障排除...................................................................... .................................................51bizhubC250_FS_Total_E TOC.fm Page ii Friday January 5 2007 4:11 PM安全和重要警告事项S-1在进行维修工作前请仔细阅读如下所述的安全和重要警告事项并充分理解其含义。

PS900系列电源选择指南说明书

Guide to selecting a power supplyThe PS900 Series provides a variety of flexible options allowing you to design custom solutions to address a broader range of applications. This brief guide will help you configure the proper solution based on the unique characteristics of your opening. If at any point in the system design or installation process you need assistance, you can turn to the security and safety consultants at Allegion for support.1. Sizing a supplySimple as they may seem, power supplies play a critical role in your access control system. They protect devices downstream by providing filtered and regulated power. To begin with you must determine the number of devices that will be connected to the power supply and the type of device - electric strikes, electromagnetic locks, electrified mechanical locks, exit devices, automatic operators or accessories such as pushbuttons. Each type of device has specific current demands. For example, high in-rush exit devices pull a significant current to retract or unlock the device and then drop to a lower holding current. If a device has an in-rush current you also need to determine how long the in-rush current lasts.Power supplies convert high voltage AC power into the low voltage DC outputs required by most access control devices. Begin by checking the input voltageto ensure that it is compatible with your buildings source AC power. The PS900 Series, for example, features a universal 120-240 VAC input. All devices fed from a power supply must accept the same output voltage – typically 12 VDC or 24 VDC. To calculate the total load, add the peak current draw of all devices in the system to determine the required amperage of the supply.Gather the following information to determine the necessary size of the power supply:Number of devicesType of devicesIn-rush current requirementsDuration of in-rush currentCalculate the total peak currentdraw of all devices in the system to Array determine the required amperageof the supply.§Schlage PS902 - up to 2 amps §Schlage PS904 - up to 4 amps §Schlage PS906 - up to 6 amps §Von Duprin PS914 - up to 4 amps continuous current and capableof providing 16 amp high in-rushcurrent for 300 msecAllegion • Guide to selecting a power supplyAllegion • Guide to selecting a power supplyNote:§All devices fed from a power supply must accept the same output voltage.§Battery powered devices not included in above reference table. Please refer to data sheets for more information.2. Choosing option boardsCheck for fire door labels on the door and frame. If an opening is fire ratedcode requires that the door have positive latching, which fail-secure hardware provides.§Fail-secure hardware is locked when power is removed. Power is applied tounlock the door.§For applications, such as stairwell re-entry doors, where access is requiredupon fire alarm, fail-safe hardware is applied. Fail-safe hardware is unlocked when power is removed. Power is applied to lock the door.The PS900 Series offers the 900-FA option board which cuts power to downstream devices when the fire alarm is activated to allow forfail-safe/fail-secure conditions. For the PS902 the 900-FA board can beconnected directly to the main printed circuit board (PCB) on the supply. For the rest of the PS900 Series power supplies the 900-FA board must be connected to another option board.§900-FA: Emergency interface relay integrates with fire alarm and is used tocut DC output in case of emergency.Quick surveyIdentify if the opening is fire rated or has special requirements, such as re-entry upon fire alarm. Then identify if it requires hardware for fail-safe, fail-secure, or both conditions upon loss of power or fire alarm. Always consult your local AHJ for requirements of the opening if it is unclear.About AllegionAllegion (NYSE: ALLE) is a global pioneer in seamless access. We keep people and their assets safe, wherever they are, bringing together simple solutions, convenient access and advanced technology. For more, visit © 2022 Allegion 010491, Rev. 09/22 /usIs access control still required in the event of a power outage: Yes NoAllegion, the Allegion logo, Von Duprin, the Von Duprin logo, Schlage and the Schlage logo are trademarks of Allegion plc, itssubsidiaries and/or affiliates in the United States and other countries. All other trademarks are the property of their respective owners.3. Appli c ationThe PS900 Series allows you to address a wide range of applications with options boards that can be combined and configured in countless ways. Acomplete operational description of the opening is essential. How many doors are there? Is logic or sequencing required?§900-4R: 4 independently controlled relays to power multiple devices§900-2RS: 2 relay EL panic device control board providing time delay betweenthe firing of the outputs§900-4RL: 4 relay board with integrated logic for controlling security interlocks,auto operators and time delays§900-8F: 8 individually fuse protected outputs, giving the flexibility to powermultiple devices and provide another layer of protection§900-8P: 8 positive thermal coefficient (PTC) protected outputs 6. Battery back upUpon loss of building power it is important that your access control devices still function properly. The 900-BBK board provides up to four hours of backup power at the same output voltage as the power supply. There is a dedicated location on the supply for the 900-BBK board that nothing else can go on so in most cases it does not take away space from other option boards. The exception to this is the PS906. The PS906 can accommodate: a.) two option boards and a 900-BBK kit, or b.) three option boards and no 900-BBK kit.§900-BBK: Battery backup kit (includes battery backup board and two 7A/hr.batteries) and provides up to four hours of backup power when cycled every 5 minutes at full loadNumber of connectorsPS902 1 (2 amps)PS904 1 (4 amps)PS906 1 (6 amps)PS914 1(4 amps high inrush)Option boards 123 22Battery backup board11111 One fire alarm board can be connected directly to the PS902. If a fire alarm board is desired for the PS904, PS906 or PS914, it must be connected to an option board.2 If battery back-up is installed, only two additional option boards can be used.Provide a complete operational description of the opening.。

两万预算单机身有什么推荐吗？

在数码摄影领域，相机是最为重要的器材之一，而如何选择一款性价比高的单机身相机也是摄影爱好者们最为关注的话题之一。

如果你的预算在两万左右，那么选择一款适合自己的单机身相机就显得尤为重要。

那么，到底有哪些单机身相机适合这个预算呢？我们要了解单机身相机的概念。

所谓单机身相机，就是指相机本身不带有镜头，需要用户自行购买镜头才能使用。

这种相机通常具有更高的画质和更丰富的拍摄功能，适合有一定摄影基础的用户使用。

接下来，我们来看看在两万预算内，有哪些值得推荐的单机身相机。

佳能EOS R6是一款非常不错的选择。

这款相机采用了全新的RF卡口设计，可以兼容佳能EF卡口镜头。

它还采用了全新的CMOS传感器和DIGIC X图像处理器，画质表现非常出色。

它还支持4K视频拍摄和高速连拍功能，非常适合拍摄运动场景。

不过需要注意的是，这款相机的售价较高，需要准备足够的预算。

尼康Z6 II也是一款性价比较高的单机身相机。

它采用了尼康自主研发的Z卡口设计，可以兼容尼康F卡口镜头。

它还采用了全新的CMOS传感器和EXPEED 6图像处理器，画质表现也非常优秀。

它还支持高速连拍、4K视频拍摄等功能，非常适合拍摄运动场景。

除了以上两款相机，索尼A7 III也是一款非常不错的选择。

这款相机采用了索尼自主研发的E卡口设计，可以兼容FE卡口镜头。

它还采用了全新的CMOS传感器和BIONZ X图像处理器，画质表现非常出色。

它还支持高速连拍、4K视频拍摄等功能，非常适合拍摄运动场景。

需要注意的是，这款相机的售价也比较高，需要准备足够的预算。

除了以上三款相机，还有一些其他的单机身相机也是非常不错的选择，例如富士X-T4、索尼A6600等。

不过需要注意的是，每款相机都有其自身的特点和适用场景，需要根据自己的需求和拍摄习惯进行选择。

在两万预算内，选择一款适合自己的单机身相机并不是一件容易的事情。

需要根据自己的需求和预算进行综合考虑，并在多方面进行比较和评估。

松捷五代009配置参数表

松捷五代009配置参数表一、简介松捷五代009是一款高性能、高可靠的服务器，具有强大的计算和存储能力。

本文将详细介绍松捷五代009的配置参数表，包括处理器、内存、存储、网络等方面的参数。

二、处理器参数1. 主频• 2.8 GHz2. 核心数•24核3. 线程数•48线程三、内存参数1. 容量•总容量：256 GB•类型：DDR4•频率：3200 MHz2. 插槽•支持最大8个内存插槽1. 硬盘容量•可选1TB、2TB、4TB、8TB等不同容量2. 存储控制器•内置RAID控制器3. 存储接口•SAS / SATA / NVMe五、网络参数1. 网络接口•2个千兆以太网口•2个万兆以太网口2. 扩展插槽•支持最多4个扩展插槽，可插入光纤网卡、高速以太网卡等六、电源参数1. 电源容量•800W2. 热备份•支持热备份，可无缝切换电源1. 外观尺寸•高度：4U•宽度：482.6 mm•深度：800 mm2. 支持系统•支持常见的操作系统，如Windows Server、Linux等3. 虚拟化技术•支持虚拟化技术，如VMware、Hyper-V等4. 管理接口•支持远程管理，可通过IPMI进行管理八、总结本文介绍了松捷五代009的配置参数表，包括处理器、内存、存储、网络等方面的参数。

松捷五代009拥有强大的计算和存储能力，适用于各种场景，包括企业数据中心、云计算等。

希望本文对您了解松捷五代009的配置参数有所帮助。

以上就是松捷五代009配置参数表的介绍，谢谢阅读！。

畅享极清质最适合影音娱乐爱好者的CPU排行榜

畅享极清质最适合影音娱乐爱好者的CPU排行榜现如今，随着科技的不断进步和数字娱乐的高速发展，越来越多的人开始追求高质量的影音体验。

然而，在选择电脑的CPU时，很多人常常陷入纠结和困惑。

本文将向大家介绍一份适合影音娱乐爱好者的CPU排行榜，供大家参考选择。

一、英特尔 Core i9-10900K英特尔 Core i9-10900K是一款强大的桌面级处理器，它拥有10个内核和20个线程。

这款处理器采用了英特尔的Comet Lake架构，主频高达3.7GHz，最高超频频率达到了5.3GHz。

这个处理器的强大性能使其能够轻松应对4K甚至8K的视频处理和编码工作，大大提高了用户的影音娱乐体验。

二、AMD Ryzen 9 5900XAMD Ryzen 9 5900X是一款领先的桌面级处理器，它采用了AMD 的Zen 3架构。

这款处理器拥有12个内核和24个线程，主频为3.7GHz，最高超频频率可达4.8GHz。

AMD Ryzen 9 5900X强大的多核性能和优化的单核性能，使其成为编辑、剪辑、渲染等高强度工作的绝佳选择。

同时，它也适合影音娱乐爱好者，提供卓越的图像和声音效果。

三、英特尔 Core i7-10700K英特尔 Core i7-10700K是一款高性能的桌面级处理器，它采用了Comet Lake架构，拥有8个内核和16个线程。

主频为3.8GHz，最高超频频率为5.1GHz。

这款处理器在游戏和影音娱乐方面表现出色，能够处理高帧率的游戏和流畅的高清视频播放。

四、AMD Ryzen 7 5800XAMD Ryzen 7 5800X是一款强大的桌面级处理器，采用了AMD的Zen 3架构。

它拥有8个内核和16个线程，主频为3.8GHz，最高超频频率达到4.7GHz。

这款处理器的高性能和卓越的能耗效率使其成为游戏和影音娱乐爱好者的不二之选。

综上所述，畅享极清质最适合影音娱乐爱好者的CPU排行榜提供了几款优秀的处理器选择。

Irix 11mm f 4 非鱼眼全帧DSLR镜头评论说明书

Irix 11mm f/4 Lens Reviewby E.J. PeikerThe Swiss designed and Korean manufactured Irix 11mm f/4 with Nikon mount was received in the office of one day after it was released for shipment in the USA. It is the widest non-fisheye full frame DLSR lens on the market. Only the Canon EF 11-24mm f/4L zoom lens can match its field of view on the wide end. The Irix 11mm comes in two different trim levels but they are optically identical. The Firefly lens, which is also the first model shipping, is housed in a high grade polycarbonate body with full weathersealing while the Blackstone lens is an all metal construction with etched glow in the dark lens markings. The Blackstone model is of course a bit heavier at 790g vs. 730g for the Firefly. The Firefly version of the lens was used for this review. It is extremely well constructed and still a weighty chunk of glass - I would rate its overall construction well above most lenses constructed of polycarbonate including the Nikon polycarbonate lenses. While I haven't personally handled the all metal Blackstone lens, I have it on good authority that it is built like a tank! Due to the very small focal length and its 126 angle diagonal field of view (117 angle horizontal field of view), it has a large bulbous front element with a permanent built-in lens hood. As such, it does not accept screw-on filters however one can drop slip in filters such as a Neutral Density (ND) filter in a rear lens mount filter slot. The Lee 150mm filter system can be kluged to work on this lens if front filters such as a polarizer or Graduated Neutral Density (GND) are required. While this is a manual focus lens, it does have electronic contacts and a lens ID chip. This allows the aperture to be changed from the camera body aperture controls and the correct EXIF data is written to the image files which will allow detection and automatic correction of lens artifacts such as vignetting, linear distortion and chromatic aberration if and when RAW converters support the lens directly. In the mean time, I will provide some correction values for Capture One and Adobe products in this review. The lens does not have a manual aperture ring.The manual focus ring, while notZeiss/Voigtländer smooth, provides a greatamount of feedback and is mechanical innature giving very precise control. Infinityfocus is easily achieved with a click stopeven though the lens does focus beyondinfinity for extreme atmospheric andinfrared situations. The focus ring has alocking mechanism in situations wherefocus distance is constant . On a Nikonbody, the aperture is controlled via theolder electro-mechanical linkage similar toG lenses, not the newer E-lens fullyelectronic linkage that has appeared in themost recent Nikon lens releases. On aCanon body the lens has a fully electronicaperture diaphragm since all Canon EOS cameras have a 100% electronic mount. One great addition that is missing in many of today's lenses is an infra-red focusing mark which allows the photographer to dial in the proper offset for infrared photography since infrared light focuses in a different plane than the median wavelength of visible light.The Irix 11mm f/4 Firefly lens ships in an attractive metal box and comes with a soft case while the Blackstone ships with a hard case. In the USA the Firefly retail price is $575 and the Blackstone's price is $775 - to reiterate, they are completely identical optically. A full comparison provided by Irix is found below:I put the Irix 11mm f/4 lens through a battery of optical tests and did some in the field shooting.I ran comparisons against the excellent Voigtländer Ultra-wide Heliar III 12mm f/5.6 lens as it is the only other prime lens in the focal length vicinity of the Irix lens for full frame cameras. My review of the Voigtländer lens can be found here:/Quack%20PDF/Voigtlander%20Trio.pdfFull frame tests were conducted on a Sony a7R Mk II 42 megapixel camera as it is the most demanding sensor in 35mm format available to me. APS-C tests were conducted on the Nikon D500 and D7200.SharpnessUtilizing the 4000 line per frame ISO 12233 chart the lens easily resolved all 4000 lines in the center even wide open at f/4. Towards the edge on a full frame camera there was some visiblefall-off at f/4 but less than I expected for a lens this wide. This was still visible at f/5.6 but became nearly undetectable at f/8. In the corners, the Irix lens is slightly sharper than the excellent Voigtländer 12mm f/5.6 lens at all apertures but not enough to choose one lens over the other - the difference is quite small. On an APS-C cropped camera, the softest part of the lens is cropped and by f/5.6 the Irix lens is excellent as is the Voigtländer.Chromatic AberrationChromatic Aberration (CA) is visible at all apertures but much more noticeable at f/4 and f/5.6 in both the full frame, and to a minimal extent, the APS-C frame. I processed the lens through the automatic CA Analysis tool in Capture One and the CA completely disappeared. Similarly, in Adobe Camera Raw, checking the Remove Chromatic Aberration box in the Color tab of the Lens Correction section, all CA disappeared. Since Lightroom uses ACR under the hood, I would expect it to completely rid the image of CA as well. No noticeable reduction in resolution was seen by applying automatic CA reduction. If CA correction is accidentally forgotten in the RAW converter, one can stillcompletely correct it in the lenscorrection filter withinPhotoshop by dialing in a -15adjustment on theGreen/Magenta slider. Bycomparison, the Voigtländerlens has nearly zero CA whichis mind boggling for such a tinylens.VignettingLike all super wide lenses, theIrix 11mm f/4 suffers fromnoticeable light fall-off in the corners, often referred to as vignetting. It is, however, less than the fall-off on the Voigtländer Heliar III despite being a full stop faster. In Capture One for a shot photographed at f/4, a Light Falloff correction of +33 is required to eliminate this and it stays relatively constant at smaller apertures. At f/8, a value in the high 20's gets rid of the light fall-off. With the Adobe products a +73 value is required at f/4 while a +41 value takes care of the light fall-off at f/8. On an APS-C camera, about half of the values above are appropriate to get rid of any ultra-wide angle vignetting. By comparison, the Voigtländer requires a Capture One correction of +49 wide open at f/5.6. Users of Capture One can easily create a Lens Cast Correction profile for the lens and apply those in the RAW processing flow which will eliminate any vignetting on either lens without having to add in this adjustment. For more information on LCC profiles and how to create them, see my Summer 2017 Newsletter...(/Quack%20PDF/Quack%20Summer%202017.pdf)Linear DistortionIf there is one area where the Irix lens disappoints, it is in linear distortion. The distortion is in the form of significant barrel distortion and it is approximately double the barrel distortion of the Voigtländer lens. In the photograph of my bookcase, one can easily see how bowed the shelf is. Once you correct for the distortion on both lenses, they are virtual identical in field of view despite the Irix being a wider angle lens which should have a 5 degree wider angle of view. This is due to more of the image needing to be cropped after linearization of the photograph on the Irix 11mm f/4 than on the Voigtländer 12mm f/5.6. In most landscape applications, as long as there isn't a straight horizon or a vertical feature along the edge this won't be a problem. But in architectural or real estate applications, one will have to take into account that about 8 degrees will be lost off of the angle of view if truly vertical lines are desired - consider both lenses 12.5mm lenses if linear correction is necessary. In Capture One, a 34% correction level in the Distortion slider is required to correct this barrel distortion and in Adobe products, a +15 value is required - these adjustments are independent of frame size so one would use the same values for full-frame and APS-C. On a mirrorless camera like the Sony a7 series, due to the relatively strong linear distortion, the Voigtländer 12mm Heliar III is the better choice as it is much smaller and does not need an adapter. Only if the extra stop of an f/4 lens is needed or the lower price of the Irix is a consideration should one consider this lens for a mirrorless camera. On a DSLR though, this lens is the best and least expensive option into the realm of the "insanely-wide" rectilinear lens world. Canon shooters have the 11-24mm lens available at more than 5 times the price of the Irix but image quality isn't better than the Irix. In my limited experience with the Canon 11-24L, I would rate the Irix 11mm f/4 ahead of the Canon 11-24mm lens at a focal length of 11mm.Infrared ConsiderationsOne of my main reasons for wanting to evaluate this lens was as a wide option for my APS-C infrared converted cameras (Nikon D7100 - 720nm and Sony a6000 - 665nm). I thereforeevaluated the lens for hot spots in the infrared spectrum. This is a common occurrence in many lenses. In the visible spectrum the color and illumination is uniform or at least behaves in apredictable manner such as with vignetting. In the infrared spectrum, however, lenses can have a relatively harsh spot, usually in the center, where the lens behaves very differently than in other areas. This lens clearly is intended to cater to the infrared shooter with its infrared focus offset markings on the lens barrel. The lens does have a hot spot in the center that is more pronounced at f/16 and f/22 and is just barely visible at f/11 - this hot spot also has a slight color shift. At larger apertures it is absent. For this reason I produced lens cast correction (LCC) profiles for the lens to be applied in Capture One. Below, please see a rendering of this hot spot in the f/22 case on the left and after lens cast correction on the right (which also eliminates the vignetting). I have increased the contrast to make it more visible in this article - the hot spot, nor the vignetting are nearly as bad as the illustration below would lead one to believe:As you can see, the lens cast correction profile that I created for this lens will render infrared images perfectly. Note that an LCC profile can also be used for normal visible light color photography as indicated in the section on vignetting above.Discussion and SummaryThe Irix 11mm is the second focal length lens offered by the relatively new Swiss premium lens company Irix It is their second focal length offering following on to their widely acclaimed 15mm f/2.4 Firefly and Blackstone lenses. Overall, it's build quality is exceptional and handling is outstanding with convenience features such as a focus ring lock, a focus ring thumb rest, a positive click stop at infinity, full weather sealing and an expanded hyperfocal scale based on a more modern circle of confusion value of 15 microns rather than the classical value of 30 microns. This means that the hyperfocal scale is much more appropriate for today's highresolution sensors than lenses which feature the classical hyperfocal scale. Optically the lens is very good, better than the benchmark Voigtländer 12mm lens in some categories and a bit worse in others but for a DSLR user, this is an exceptional option. Some might think that it isjust too hard to manually focus a lens where features are so small in the viewfinder due to the extreme wide angle of view but this really couldn't be farther from the truth as the depth of field is enormous. A landscape photographer can simply focus the lens to a little past 4 feet and lock it in place with the focus ring lock, select f/8 as the aperture and be assured that even on a very high megapixel camera like the Sony a7R Mk II or Canon EOS 5DS(R), everything from 2 feet to infinity will be sharp - one essentially never has to focus the lens unless something is closer than 2 feet. The more I use the lens, the more smoothly the focus ring is becoming indicating that the focus mechanism is going through a break-in period, which is not unusual for mechanical manual focus lenses.In photographic situations where there are straight lines away from the center of the frame, the photographer must be aware of the linear barrel distortion that will result in some loss of the edges if corrected. Similar to shooting with a fisheye lens, one must be careful not to include their own feet or tripod legs, especially when shooting close to the ground. Until lens profiles are available in RAW converters, it is important to take action to eliminate chromatic aberration.On an APS-C camera, this lens really shines and becomes the approximate equivalent of a 16.5mm lens with staggering depth of field and better image quality than any zoom that goes that wide on the 1.5x crop sensor (1.6x for Canon resulting in 17.6mm effective focal length). CA correction is not necessary in most situations on a crop sensor camera.I did not evaluate the lens for astro photography due to its f/4 aperture and feel that the Irix15mm f/2.4 is better suited for that application.Below, please find a couple of sample shots that I took in my neighborhood park. I purposely shot a subject with lots of detail in the corners and I am much more impressed with real world results than I am with the test chart results despite focusing the center and corner separately in the test chart shots due to the extreme angle and much bigger distance from camera to subject in the corners than in the center. In real world shooting, I saw very little detectable falloff in sharpness in the corners, so little that one really needs to pixel peep to see it. Similarly, the linear distortion was just not seen since I did not shoot subjects in nature with horizontal lines. If using this lens on a straight horizon, one definitely will want to consider some distortion correction and in any kind of shooting that includes buildings, distortion correction will be a must. This is clearly a specialty lens and the vast majority of photographers simply do not need anything wider than 16 or 20mm but for those that really like including a lot of foreground or those that shoot in tight places will this 11mm lens will be welcomed. Overall I find this lens to be an excellent addition for the photographer that demands this type of extreme wide angle lens and enthusiastically recommend it.DisclaimersE.J. Peiker conducts consulting services and product design services for a number of photographic product companies. Those that know me know I would not endorse a product even for compensation if I did not feel it were a superior product.E.J. Peiker is a member of Nikon Professional Services and receives some services free of charge from Nikon USAE.J. Peiker is a Sony Digital Imaging Pro and receives some services at a reduced cost and free of charge from Sony USAhttps:///info/1523/US/ENE.J. Peiker is a Wimberley Professional Services featured photographer and receives non-monetary compensation from Wimberley. Visit Wimberley at E.J. Peiker is sponsored by Hunt's Photo and Video - New England's largest photography retailer. Visit them at/E.J. Peiker is a co-founder of and leads photographic workshops under the NatureScapes Certified Workshops bannerLegal Notice: Written and Photographic Content ©2017 E.J. Peiker, Nature Photographer. The text and photographs contained herein may not be copied or reproduced without written consent. This newsletter may be forwarded without restriction unaltered and in its entirety only.。