Nikon Nikkor-D 1:4 f=40mm for Bronica 6x6
This is the widest production lens that Nikon made for Bronica S, S2 & S2A cameras, with an angle of view wider than a 24mm lens in 135 format.
The lens is relatively compact except for the front which flares out to accept massive 90mm filters.
First lenses are marked "Nippon Kogaku Japan".
Most are marked "Nikon", but otherwise the same as before.
Last small batch of lenses marked NIKKOR-DĚC with multicoated lenses.
Later lens marked "Nikon":