[quote name='genotypewriter' timestamp='1295171709' post='5569']
Are all rectilinear lenses made the same?
[/quote]
Well, to be called "rectilinear corrected", the projection used in the lens
must follow the formula
FOV (rectilinear) = 2 * arctan (frame size/(focal length * 2))
as good as possible ... since it is this projection formula that
keeps the straight lines you see straight on the image you take.
So, yes, the better the correction of the lens, the more accurate it
will follow this formula.
Are all rectilinear lenses made the same?
[/quote]
Well, to be called "rectilinear corrected", the projection used in the lens
must follow the formula
FOV (rectilinear) = 2 * arctan (frame size/(focal length * 2))
as good as possible ... since it is this projection formula that
keeps the straight lines you see straight on the image you take.
So, yes, the better the correction of the lens, the more accurate it
will follow this formula.