Tim asked:
Ok math experts out there, how can you calculate the angle of view
across the width of the frame for any given lens... using the angle
across the diagonal as a reference <snip>
-----------------------------------------
Hi Tim,
Try this instead. Go to this website and download the free "f/calc"
utility. It's available for Windows, Mac, and Linux and as freeware for
Palm OS. This is a real handy and easy to use tool for calculating
lots of photograpy related stuff. Angle of view vertically, diagonally
and horizontally given focal length and film format is just one of its
calculation tricks.
I think someone on the list probably pointed this out to me in the past
but I don't remember who. Anyhow, I'm returning the favor. Try it.
You'll like it.
<http://www.tangentsoft.net/>
Chuck Norcutt
Woburn, Massachusetts, USA
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