Archived posting to the Leica Users Group, 1998/11/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thomas J. Donovan wrote: > It would still be nice to know more details about the > results of the 180 f2.8 apo test ........in English (&>)! - ------------------------------------------ Excellent--------------------------------- x Very Good---*x------*-------*x-------*x--- Good-------------------------------------- Average----------------------------------- Weak-------------------------------------- f/2,8 f/4 f/5,6 f/8 x = center * = angles Light fallof : f/2,8 sensible = 0,5 f/stop f/4 = negligible Distorsion = negligible The flatness of field is excellent, like with a very good macro lens. (first time I read that comment in C.I.!) Colour neutral. The Apo-Telyt-R 180/3,4 tested in the September had only four stars, but the results were the same except that the results at f/4 of the Apo/2,8 were the same with the Apo/3,4 at f5,6 only. the light fallof was negligible at f/8, and the distorsion = 0,4% Colour a little bit warmer. For the rest, I'm sure that Pascal will translate much better than I can do. Cheers, Lucien