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Nikon R-UW Fisheye-Nikkor 13mm f/2,8

Based on 16mm 2.8, this is an underwater only lens, its dome and casing integrated with the lens. Nikonos RS film camera only

8 elements / 5 groups please note the crazy waterproof construction.

This incredible beauty is an underwater fisheye. Made for the first underwater interchangeable lens reflex system, the Nikon RS.
This was intended with a glass-water surface in mind, so no land use, sorry. It would simply not be able to focus. As for the design, it is adapted from the Nikkor 16mm 2.8, and shares also the bayonet filters at the rear, but covers 170 degrees on the diagonal instead of 180.

the incredible view of the 13mm UW dome, courtesy of eBay seller gokevincameras
back of the lens with the bayonet filter, with L37c installed, the same ones you may find on 16mm f2.8, AI, AIS, or AFD, and as well on 13mm rectilinear. The image courtesy of eBay seller gokevincameras

a great THANKYOU to Marco Cavina for the infos, you can find far more on his NIKONOS PAGE.
As always MIR pages are a precious information source

Lens info
Focal Length:
Camera Format:
Lens Type:
Lens FOV:
Lens Mount:
Lens Hood:
Filter Type:
Bayonet Back
Lens Elements / Groups:
8 / 5
Image Circle:
Years Manufactered:

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