Minolta Hi-Matic 7s (no meter) brand_Canon This helicoid extension tube lets

This helicoid extension tube lets you seamlessly adjust magnification for close-up work with your Pentax 67 and nearly any Pentax 67 lens (not included)

but call Nikon and ask them if they can replace that focusing motor when it breaks

Here it is

Traditionally used for large format lenses

and it's honestly not that bad

Minolta Hi-Matic 7s (no meter) brand_Canon This helicoid extension tube letsThe Minolta Hi Matic 7s is a well made 35mm rangefinder camera with fully mechanical shutter speeds and a 45mm f1. 8 Rokkor PF lens. Good shutter speeds, new light seals, and an accurate rangefinder no light meter, though, so you'll need to guess your exposures (or use an external light meter). Cosmetic condition is very good, with light wear from normal use, a shallow dent on the winder side. Includes original case. Remember: this camera does not