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| p.3 #9 · 5D2 FW 2.0.4 - Iris jitter in M movie mode |
I use a Sigma 105mm macro on my 5d2, but I've no interest in testing for this problem since I rarely shoot video and this sounds like a rather obscure problem, kind of like the old "oh so horrible black dot" issue.
Well, I do record video and I can tell the iris jitter on the 100mm 2.8 Macro is SO easy to reproduce that -sadly- you cannot use it for video purpose if you need to change focus while recording. So I don't think "oh so horrible..."
It IS a real bug and a real problem for those who want to use this or other lenses on video.
Some people may not need a fix because they don't use Movie/Video functions, but others do need it indeed.
I have heard some stills shooters having problems with 3rd party lenses, hearing weird noises that there were never before 2.0.4. I can't confirm that, but even if that is not accurate, it's clear there is a bug related to the iris control / camera-lens communication that needs a fix, and will be fixed (with the help of the users reports/feedbacks/requests to Canon)