I need a little clarification..... With the D200 on the horizont, my dearest wish came true: metering with non-AF Lenses! :biggrin: :biggrin: But all I know about (from 2 years reading DPR Lensforum) are mostly the AF-Generation Lenses Now I'm in the market for some MF-gems (50mm 1.2 for really low light, 35 1.4 for walk around, maybe some 300 or 500 Tele....) and some bellows, hopefully before everyone else :wink: . But I'm still a little confused: What are the differences (using and metering) between AI, AIS, non AI, MF, Series E? Something about handling the aperture Maybe someone can enlighten me, or prevent a link to some explanation? I'm sure I'm not the only one in need of a Nikon-Lens-History-Lesson! Every Help is much appreciated!