[Nonmem]

Are there compatibility problems with any EF lenses made by third party manufacturers?

Sometimes. Unfortunately certain third-party lenses not built by Canon, notably many older Sigma lenses, will not work correctly on some newer EOS camera bodies like the Elan 7/EOS 30/33 and the digital EOS 10D. The most common symptom is the mirror flipping up and then the camera freezing when you try to take a photo. You then have to switch the camera off to unlock it. The only solution to this problem is to see if Sigma will upgrade the lens for you. If they still have inventory of the control chip they apparently will happily do so for free.

The only third-party maker of EF-compatible lenses with no major compatibility problems so far is Tamron. Some people have suggested that this is because Tamron have licensed official lens protocol data from Canon, but Canon USA’s Chuck Westfall has stated repeatedly in public fora that Canon have never licensed their lens mount protocol to any other manufacturer. So Tamron have either been very lucky or very clever in their reverse-engineering of the Canon lens system. They seem to be a reasonably safe bet right now for compatibility, given their track record, but it’s impossible to predict future developments in this regard.

The following Sigma lenses require upgrading for compatibility with newer EOS cameras, according to Sigma:

24-70mm 3.5-5.6 aspherical UC
28-80mm 3.5-5.6 mini zoom macro aspherical
28-80mm 3.5-5.6 mini zoom macro aspherical HF
28-80mm 3.5-5.6 mini zoom macro II aspherical
28-105mm 2.8-4 aspherical
28-105mm 3.8-5.6 UC-III aspherical IF
28-135mm 3.8-5.6 aspherical IF macro
28-200mm 3.5-5.6 DL aspherical IF hyperzoom macro
28-300mm 3.5-6.3 DL aspherical IF hyperzoom
70-210mm 4-5.6 UC-II
70-300mm 4-5.6 APO macro super
70-300mm 4-5.6 DL macro super
100-300mm 4.5-6.7 DL
135-400mm 4.5-5.6 APO aspherical RF
170-500mm 5-6.3 APO aspherical RF
8mm 4 EX circular fisheye
15mm 2.8 EX diagonal fisheye
24mm 2.8
28mm 1.8 II aspherical
50mm 2.8 EX macro
105mm 2.8 EX macro
300mm 4 APO tele macro
400mm 5.6 APO tele macro
500mm 4.5 APO
500mm 7.2 APO
800mm 5.6 APO
28-70mm 2.8-4 UC
28-105mm 4-5.6 UC
28-105mm 4-5.6 UC-II
70-210mm 3.5-4.5 APO macro
28-200mm 3.8-5.6 aspherical UC

[会飞的胖子]

靠，偶的70-300系佳能的头

SIgma那个是28-105地

[walleye]

打倒Nonmem！

[Nonmem]

墙眼大师为嘛要打倒俺？莫非也有Sigma的头烂在手上鸟？

一石二鸟啊！　

[阿龙]

Nonmem好象很注意器材, 有时间也应该多拍些片片啊?

[Nonmem]

阿龙同学，俺是想拍片子啊，可是俺的相机送修N久了还没有修好，俺经常性地在脑海里捏影，同时上网虚拟购物，脑海里全是Matrix那种场景：相机，很多很多的相机。然后两边哗哗的列出几万台随手拿一个都是1Ds MK II+70-200/2.8L IS，然后俺胸口挂三个腰里还别一台Casio Exilim 770，大摇大摆过安全门，警卫目瞪口呆看着俺的装备曰：holy shit. 然后俺拔出相机瞄准……

然后奏醒了——眼泪哗哗的。

现在你说，对俺有没有那么一点儿的同情？！！！

[麦子谷子]

原来还有一部血泪史好写啊。。。

[Nonmem]

麦子同学：就是血泪史。你这样一位充满同情心的同学肯定已经决定把你的20D给俺送过来了对吧？

[walleye]

俺米有Sigma，俺全是C头。只不过这两天帮朋友测试一个Sigma 28-70F2.8的头。另外非胖是个敦厚的人，看被你这折磨的。

[Nonmem]

walleye 写道:

另外非胖是个敦厚的人，看被你这折磨的。

墙眼大师骂淫真是狠呀