Nikon Nikkor Ai 35mm f1.4

A direct Ai upgrade from the previous K model. The Ai model only stops down to f16 instead of f22, possibly because the aperture range was too large for early Ai cameras. Nikon Ai conversion kits for older models have the same reduction in aperture range.

Serial no 400001 - 402xxx engraved "LENS MADE IN JAPAN" in white, 5 screws in mount
Serial no 401xxx - 403xxx engraved "MADE IN JAPAN" in black, 5 screws
Serial no 403xxx - 416xxx engraved "MADE IN JAPAN" in black, 3 screws
Date 1977 - Nov 1981