With this lens adapter, you can mount Pentax M42 telephoto lens on all Nikon AI mount. The adapter mount adds a large number of compatible lenses to the Nikon AI system.

When using the adapter mount, please take note of the following issues: Autofocus (AF) is not available; Stop-down metering is used. Spot metering mode does not work properly. Although it is possible to use the A (aperture-priority AE) mode in auto exposure, the aperture display is not available. In the P (Program AE), or S (Shutter speed-priority AE) mode the shutter releases, but the auto exposure control does not work. The distance scale on the Nikon system lens may not indicate the actual distance. Always use the viewfinder for focusing. Alternatively, use the Live View on the LCD for focusing (10x zoom focus assist available in manual focus mode). Specifications: (Third-party) M42 lens adapter for Nikon AI camera; Compatible Lens: Pentax M42 lenses including telephoto lens; Compatible Camera Models: Nikon(digital):D7000, D5100, D5000, D3200, D3100, D3000, D800E, D800, D700, D600, D300S, D300, D200, D100, D90, D80, D70s, D70, D60, D50, D40x, D40, D4, D3X, D3S, D3, D2H, D2XS, D2X, D1X, D1; Nikon (film):F90, F90X, F80, F80s, F70, F75, F60, F65, F65QD, F55QD, F50, F40/X, FA, F3/T Black, F3/T Classic, F3 Limited, F3AF, F3T, F3HP, F3, F801s/N8008s, F401x, F401s/ N4004s QD, F601/ N6006QD, F601m, F4s, F4e, F4 Press, F4, F801/ N8008, F401/ N4004 QD, F301/ N2000, DSC 200, DCS 410, DCS 420, DCS N2000e, DCS 460, DCS 315, DCS 330, F5, Pronea 600i, F3 High Spped Motor Drive Camera, F-100; ; Fujifilm: S5, S3 Pro; Kodak: DCS-620 (x), DCS-660 (M), DCS-760, DCS-720x; Dimensions: Ø60mm x 5mm; Made of metal; Silver in color; Net weight: 18g; Brand new, never used.