M42-F adapter without contacts - Fits any lens with M42 screw mount. The installed adapter does not interfere with the mirror lift on full-frame Nikon digital cameras. Thanks to the presence of an optical element, it becomes possible to focus to infinity. With the M42-F adapter without contacts, you can choose the optimal solution for your shooting. List of compatible cameras M42 - Nikon: Fully compatible with all Nikon SLR cameras, Nikon F mount. Takumar, Mamiya and a host of others with M42 threads.