I plan to obtain Nikon Nikorr 50/1.4D. Can it be used for Nikon FM2?
Is it an AiS lens? I read somewhere that non AiS Lens may damage FM2.
From the Wikipedia FM2 article:
The FM2 accepts all Nikon F bayonet mount lenses that support the Automatic Indexing (AI) feature introduced in 1977. The Nikon-made AI lenses of this type are the AF-S Nikkor, AF-I Nikkor, AF Nikkor D, AF Nikkor, Nikkor AI-S, Nikkor AI and Nikon Series E types. Nikon’s most recent 35 mm film SLR lenses, the AF Nikkor G type (introduced in 2000) and the AF Nikkor DX type (2003) will mount but will not function properly.
Non AI-S lenses are those made (or designed) before 1977 and does not include any Nikkor 'D' lenses.
There's a little more information regarding this on page 50 of the FM2 User's Manual. The Manual doesn't mention 'D' lenses such as the AF-S Nikkor 50mm f/1.4D because they did not exist yet when the manual was written.