Hasselblad A12 back format_Polaroid 600 The Nikon DK7 is an

The Nikon DK7 is an eyepiece adapter that allows classic smaller-thread (19mm) accessories to attach to the larger 22mm "pro" thread found on many modern Nikon cameras (check your manual to be sure)

but still worth noting

Genuine Rollei adapter to mount M42 lenses on Rollei QBM mount cameras like the SL 35

Pushes (and pulls) well

The Tokina AT-X Pro 20-35mm f2

Hasselblad A12 back format_Polaroid 600 The Nikon DK7 is anThis is a chrome Hasselblad A12 6x6 back in excellent working order, with minor cosmetic wear, including a dent in the rear housing which which does not affect function. Film tested, with accurate spacing. Fits all Hasselblad V series cameras.