Terry
Depends on the camera make. Assuming a Nikon this has a crop factor of 1.5 which has to be taken into account.
The calculation is Focal Length of lens X Crop factor. Then divide this by 50mm which is the same as a 1:1 magnification.
So for a 300mm used on a Nikon DSLR -
300X 1.5 = 450mm
Divide this by 50mm
This gives a magnification of 9 which would equate to a binocular rated at 9X.
On a Canon camera with a crop factor of 1.6, the 300mm lens would give (300 X 1.6)/50 = 9.6.
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Cheers
Ken
Last edited by kennygee; 01-02-06 at 11:20.
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