What does "crop factor" mean?


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Dann

Senior Member
Mar 27, 2004
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#2
Crop factor is unique to digital coz the size of the image sensor is smaller then a 35mm film size. So u need to X1.5 or whatever it is to get the same as a 35mm file size. So the factor applies to the lens also, so if u using a 50mm lens X the factor(1.5) u get 75mm instead.
 

ortega

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Nov 2, 2004
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#3
it only affects DSLR cameras as there is a legacy frame size to refer to.

Eg. as above: if you mount a 50mm lens you will get a FOV of 75mm (with 1.5 Crop factor), the lens is still a 50mm, just that the resulting image has been cropped.
 

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