Quote Originally Posted by dslater View Post

ic-racer - In your diagram, I see that you computed your COC for the special case of a point directly under the edge of the exit pupil. However, when you making a contact print - say 8x10, most of the image points will be further off to the side so you will no longer have right triangles to work with - I believe they will be obtuse triangles. Did you try computing the COC for these?
Excellent point, though I think they would probably still be "similar" triangles and the same A, A prime, B, B prime, C, C prime in the diagram would still be equal.

Anyway, the results were a little 'blurrier' then expected. Probably OK at safe viewing distance, but I want to make out all the leaves and pebbles