How does a change in FL relate to a scalar change in FoV?

Started Jul 28, 2013 | Questions thread
Chris R-UK
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Re: How does a change in FL relate to a scalar change in FoV?
In reply to edu T, Jul 28, 2013

I don't quite understand your formula but if you double the focal length the FoV is that which you would get by cropping the shorter focal length shot in half in both directions.  If you start with an image that is 3000x2000 pixels you have to crop to 1500x1000.

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Chris R

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