- Introduced on Nikon’s first lens-interchangeable SLR, the Nikon F (1959)
F lenses have indexing system via coupling fork. Lens mount ring is full and it is not possible to mount them on most modern (D)SLRs.
- Auto aperture indexing (AI) enables automatic setting of maximum aperture (1977)
F-mount ring is cut to provide indexing on mount. Certain cameras (FM, FE, Modified F5) allows mounting both F (but without meter coupling) and AI.
- Program auto exposure mode compatibility (1981)
Auto coupling mainly with FA, replaced with CPU on AF lenses.
- Aperture information exchange with the camera body through CPU communication (1983)
First P-series lenses - 3 in 30 years - 45/2.8P, 500/4P and 1200-1700/5.6-8P
Nikon F bayonet
Nikon F bayonet- Autofocus compatibility (1983)
F3AF - AF not implemented properly by Nikon before 1988 with F4 and F-501.
Manual focus lenses can be mounted on AF cameras only if AI standard or if modified. Won't meter except with high end models (FA, F4, F5, F6, F100).
AF lenses lose coupling fork and cannot meter with older cameras (F, F2, Nikkormat etc.)
Manual focus lenses can be mounted on AF cameras only if AI standard or if modified. Won't meter except with high end models (FA, F4, F5, F6, F100).
AF lenses lose coupling fork and cannot meter with older cameras (F, F2, Nikkormat etc.)
- Digital SLR cameras compatibility (1995)
Ok D1x is 2001, all lenses focal becomes a 1.5x with smaller than film DX image sensors.
Manual AI standard lenses meter with D200/300/700/3/3x. In addition retain normal focal with full frame (FX) cameras D 700/3/3x. Auto metering capacity restored for manual AI lenses via lens database activated through the menu. Basically you tell the camera which lens is mounted and its minimum f/stop. Works also for matrix metering.
New DSLR entry models (D 40/40x/60) without AF motor get rid of indexing peg. It is possible to mount F lenses (full focus ring) on these cameras. No metering but focus confirmation is available.
Manual AI standard lenses meter with D200/300/700/3/3x. In addition retain normal focal with full frame (FX) cameras D 700/3/3x. Auto metering capacity restored for manual AI lenses via lens database activated through the menu. Basically you tell the camera which lens is mounted and its minimum f/stop. Works also for matrix metering.
New DSLR entry models (D 40/40x/60) without AF motor get rid of indexing peg. It is possible to mount F lenses (full focus ring) on these cameras. No metering but focus confirmation is available.
F lens converted to AI with official Nikon kitstill compatible with original F mount
For more detail on the evolution of the F-mount see link.
Summary of different versions of manual focus Nikon lenses see link.
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