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DPChallenge Forums >> Hardware and Software >> Angle of view after 1.6x crop
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 06/04/2004 12:58:45 AM · #1
I have a Sigma 12-24 Aspherical lens.
The 10D turns that into a 19.2-38.4.

Normally the viewing angles are 122 degrees to 84.1 degrees, respectively.

After the 1.6x crop, what does that do to the angles?
 06/04/2004 07:41:10 AM · #2
according to my pCam PDA software. 12mm=FOV from 10 feet of 29'high by 19'11" wide to 24mm=FOV from 10 feet of 14'11" high by 9'11" wide.
Now the 19.2mm=FOV from 10 feet of 18'5" high by 12'4" wide to 38.4mm=FOV from 10 feet of 9'3" high to 6'2" wide.
the angles...
12mm=112deg 25min H by 89deg 46min V
24mm=73deg 18min H by 52deg 46min V

19.2mm=85deg 57min H by 63deg 41min V
38.4mm=49deg 40min H by 34deg 18min V

It is still all the 1.6 factor

Message edited by author 2004-06-04 07:42:30.
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