08-22-2013, 11:55 AM
I think the key words are AI, AI-S & AI-P... Markus' post already explains the key functionalities. If you have a Nikon lens manufactured after 1977 (that's when AI was introduced), you will be able to meter with modern high-end Nikon DSLRs (D7000 and D300). But lower-end bodies do not allow to enter the AI lens' max. aperture and FL manually in the user menu, so you have to set the exposure manually.
How can you understand if it's AI-S? A picture worths a thousand words:
![[Image: img5.jpg]](http://www.nikonusa.com/kdb/images/ailens/img5.jpg)
You won't see that scoop on the bayonet flange for lenses before AI-S. And also the smallest aperture is marked with orange color on the AI-S lenses' aperture ring. AI-S lenses have automatic aperture controll.
AI-P lenses include a further development; a CPU which transmitts data to camera body. So you have all the exposure modes. And how can you be sure that it's AI-P, well I guess you would seek for that scoop (as in AI-S) and an electronic coupling.
Serkan
How can you understand if it's AI-S? A picture worths a thousand words:
You won't see that scoop on the bayonet flange for lenses before AI-S. And also the smallest aperture is marked with orange color on the AI-S lenses' aperture ring. AI-S lenses have automatic aperture controll.
AI-P lenses include a further development; a CPU which transmitts data to camera body. So you have all the exposure modes. And how can you be sure that it's AI-P, well I guess you would seek for that scoop (as in AI-S) and an electronic coupling.
Serkan