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. IX Nikkor lenses (1996), for Nikon's Advanced Photo System (APS) film SLRs, must not be mounted, as their rear elements will intrude far enough into the mirror box to cause damage.