Posted by Les on October 16, 2000 at 17:56:48:
In Reply to: 80mm W.F. Ektar posted by Bob Stoddard on October 16, 2000 at 16:46:16:
The only data I have for the WF 80 states that it has an angle of view of 55x68° with a 3.25x4.25 format at maximim aperture. Playing with triangles I get an image circle of 152mm at max aperture which I a s s u m e to be f6.8. If you want to know the math let me know and I'll send it via email.
Les