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Cheers Andrew, thanks for that.
I think I am reading the lens specification incorrectly? The "Angle of View" specified in the specs is what we would call in eyepiece terms the "apparent FOV". I am assuming that this is the "actual FOV". So by the calculations you've provided, the lens would have been my 50mm OM lens (I owned 2 lenses and one of those was a 50mm).
It sounds like CCD calc is the application to work these problems out.
Regards,
Stephen
Last edited by stephenb; 17-07-2011 at 03:41 PM.
Reason: added comments
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