CANONCanon Lens HallCanon FD ResourcesDetermining the Age of a Canon LensFUJICatalog of Fuji LensesLEICALeica Screw Mount LensesMINOLTAMINOLTA Manual Lens ListThe Minolta SR SystemForum and database for Alpha system usersNIKONNikon Lens Versions and Serial NumbersUnderstanding old Nikon lenses: AI, AI-S, AF and AF-SPENTAXPentax Lens Reviews