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big lie

Started Apr 4, 2015 | User reviews thread
photonius Veteran Member • Posts: 6,895
Re: Probably focus breathing...

p5freak wrote:

Focal Length are always for infinity focus. If you shoot something close the lens will shorten its focal length. Every lens does that, even a true macro prime.

actually, not all lenses.  Old lenses often not, e.g. the old Canon FD 100mm f4.0 macro does not, it behaves very much like the single thin lens formula.

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*** Life is short, time to zoom in *** ©

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Canon EF 100-400mm F4.5-5.6L IS II
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