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EF 400mm f/5.6L USM image quality

Started Jul 1, 2021 | Questions thread
John_Hoffman
John_Hoffman Senior Member • Posts: 2,245
Re: EF 400mm f/5.6L USM image quality
1

Octopuss wrote:

It's just weird that the lens won't focus at all unless it's borderline focused on a subject.

I need to try a different piece/specimen (what's the word in english damnit?) to find out whether this is normal or not.

Word would be “sample”

What camera are you using it with?

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John Hoffman
Conway, NH

 John_Hoffman's gear list:John_Hoffman's gear list
Canon EOS-1D X Mark III Canon EF 100mm F2.8L Macro IS USM Canon EF 70-200mm F2.8L IS II USM Canon EF 8-15mm f/4L Fisheye USM Canon EF 70-300mm f/4-5.6L IS USM +10 more
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