The focus-distance tag has no wiki summary.
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When a camera auto-focuses, is the current focus distance reported from the lens to the camera?
The question says it all -- does the camera "know" how far the subject is from the lens, i.e. what is the current exact focus distance set at the lens?
2
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1answer
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How much does extending affect range of focusing distances?
It's well known that moving a lens away from imaging surface will decrease both minimum and maximum focusing distance. There are times when it would be good to know how much those distances will ...
3
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1answer
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Does maximum aperture change with focus distance with the Canon 60mm f/2.8 macro lens?
This site says
The Canon EF-S 60mm f/2.8 Macro USM Lens loses 1/2 stop at 1:5, 1 stop
at 1:3, 1.5 stops at 1:1.5 and 2 stops at 1:1 (lifesize).
Can anyone confirm that at 1:5 magnification, ...
7
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1answer
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How does Nikon measure “minimum focus distance” for Macro/Micro lenses?
This question is about Nikon SLR terminology. The answer could be different for non-SLR cameras, or for different maker.
The "minimum focusing distance" in the spec — it's measured and listed between ...
