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Strange issue: Canon EF 70-200mm f/4 L IS USM acts as 85-250mm. How?

Started 8 months ago | Discussions thread
John Crowe
John Crowe Veteran Member • Posts: 3,476
Re: Strange issue: Canon EF 70-200mm f/4 L IS USM acts as 85-250mm. How?
3

Now try it with a subject about 100 feet away or even at infinity.

Seems to me that lenses will change focal length based on focus distance. You must have been at or near minimum focus distance for these shots.

 John Crowe's gear list:John Crowe's gear list
Canon EOS 5DS R Canon EF 70-200mm F4L USM Canon TS-E 17mm f/4L Kenko Teleplus Pro 300 AF 1.4x Venus Laowa 12mm F2.8 Zero-D +15 more
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