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FX & DX lenses & sensors - field of view explained
Friday, 13 April 2012 02:34
What happens to field of view? When is a 50mm a true 50mm?
1 comment
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Comment Link
Saturday, 21 April 2012 08:55
posted by PRKingCraig, Craig Robinson
Matt, Question on the focal length of a lens.
How do manufactures measure the focal length of a lens.
my uneducated thought would be the following.
50mm lens
Using a full frame sensor size cutout i.e. an old picture slide, holding the slide up 50mm away from your eye is this what a 50mm lens would be measured to replicate ???
If not how is the measurement of a 50mm lens done.
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