Hi there, I just read this morning my Chasseur d'Image files about the 80-200 f2.8D<N> (2 rings) and they mention a 0.7 stop light fall off in the corners compared to the center at 200 mm f2.8, which seems to match your measurment roughly if I am correct. They do not mention any lighter halo between the center and the corners, but I don't know if they test for that. They may take it for granted that the behaviour of a lens is a linear interpolation between the center and the corners, which may obviously not be true. I did not read the whole tread about this, but your test refers to the 80-200 f2.8D <N>, doesn't it? According to what I know, the new AF-S version has a significantly different optical design (location and number of groups and lenses seem to be different), I wonder if it exhibits the same behavior (I mean light halo, I am sure it has some light fall off in the corners). Considering the fact that that lens (at least in Japan) is now the most expensive of its category, one would expect that they could afford to solve this problem... As an amateur owning the 80-200 f2.8 <N>, I have to say that I never noticed any problem with light halo/fall off in normal circumpstances, and I believe that, although these results are interesting, they won't affect the love affair I have with that lens. I do understand that pros have higher expectations. Regards, Bernard .............................................................. Solvay Automotive Asia KK Sangenjaya - Horisho Bld. 1F, 12-39, Taishido 1-chome Setagaya-ku, Tokyo 154-0004, Japan tel.: 81-3-5433-5561 fax: 81-3-5433-5562 ..............................................................
