Nikon PB-6 format_4x5 as you might have guessed

as you might have guessed

Made by Jasper Engineering of Mountain View

This Mamiya-Sekor 55mm f4

with minor internal dust

Mounts to 19mm

Nikon PB-6 format_4x5 as you might have guessedThe Nikon PB 6 is a sturdy late model bellows that features autodiaphragm capability (with the AR 7 double release, not included) and a built in stage focusing system. Accepts any Nikon F mount lens; the camera end is a standard F mount but practical compatibility will depend on the shape of your camera (some bulkier AF and digital cameras will require an additional extension tube not included to clear the back of the rail). In near new condition.