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MA on 2.8 300MM IS USM II - Any thoughts?

Started Dec 14, 2015 | Discussions thread
BigBen08 Veteran Member • Posts: 7,473
Re: MA on 2.8 300MM IS USM II - Any thoughts?

tvstaff wrote:

Hi, I'm having trouble getting my 2.8 300mm IS USM II back to tack sharp.

I tried FOCAL and I'm getting mixed results from 0 to +3 to +7 so the results are erratic.

I've MFAed my 300 f2.8 IS II / 1D4 combo many times. I also get mixed results that seem to vary with distance to target. So I just leave MFA = 0 and get razor sharp images.

I'm interested to see how things work out when you send your lens/body to Canon.

BTW, you have a very attractive and well designed web site!

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