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focs · 10-21-2023

Hey everyone,I noticed my 2x teleconverter started acting weird, especially at appertures below f/11. Photos come out fuzzy and it's driving me crazy. I used it on a 100-400 ii that I borrowed and it glitched a couple of times. The camera wouldn't au...

focs · 07-23-2014

Hi, I had the misfortune of getting water in my 60D and now it's broken. It seems that in non-creative modes P, Av, Tv, M, B, C and Video the shutter button acts as if it's half-pressed. Because of this, absolutely none of the other buttons on the ca...

focs · 10-22-2023

Thanks for all the hypothesis on this! I'm familiar with sharpness & diffraction at slow aperture and these are 100% crops.The blur/mush/artifact is evident by simply zooming in 100% on the camera's preview screen.Something distinctly happened after ...

focs · 10-21-2023

Thanks, I updated the original post.The reason I'm posting this is because a year or two back the converter worked much better!Look at this much better photo at 400mm, full-on AF.

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EOS 5D Mark IV Fuzzy artifacts with 2x teleconverter & 70-200 lens

Shutter stuck half-pressed in non-creative modes on 60D

Re: EOS 5D Mark IV Fuzzy artifacts with 2x teleconverter & 70-200 lens

Re: Fuzzy artifacts with 2x teleconverter & 70-200 lens