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

Started Jul 28, 2013 | Questions thread
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edu T
edu T OP
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Re: How does a change in FL relate to a scalar change in FoV?
In reply to edu T, Jul 29, 2013

Thanks all, gents.

Well, I see my question was sillier than I thought. It happens that after having seen many times FoV specified in degrees for a given sensor size, I got under the impression that its relationship to a "flat field" wasn't linear and ought to be thought in terms of projection. (Hope that makes sense. :-))

And didn't give it a second thought; as you can see, trigonometry isn't the only rusty thing in between my ears...


PS: As to what

Chris R-UK wrote:

I don't quite understand your formula but if you double [ . . . ]

under the light of the answers, that formula now simply means

‚óŹ New linear crop size to match FoV at new FL = (original FL / new FL) x original linear full size

(or W'= W/n where n = L/L' )

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