Nikon AR-10 (to 10-pin)  type_Negative Storage Aperture coupling is pre-AI pin

Aperture coupling is pre-AI pin style

Interior dimensions are approximately 14x21x26 cm

mostly on the baseplate and the back mounting flange

minor dust in the optics

The Nikon D7500 is a modern DX-format DSLR with the excellent 20mp sensor from the Nikon D500

Nikon AR-10 (to 10-pin) &nbsptype_Negative Storage Aperture coupling is pre-AI pinThe Nikon AR 10 is a double release cable for Nikon autodiaphragm bellows systems, providing a mechanical release for the bellows and a 10 pin remote connector compatible with many Nikon film & digital pro SLR cameras. "But wait a minute, that's not an AR 10!" you might be saying. "An AR 10 has a two pin motor drive connector, not a 10 pin!" Well, this one has a 10 pin. Someone modified it, and they did a pretty darn clean job. Maybe not a big score