set2: 1 x M42 Nikon F Lens Mount Adapter Ring (with optical glass) + 1 x back cover & 1 x Lens Mount Adapter
It is possible to use Macro rings and other accessories.
Make M42 mount lenses (for Zeiss, Pentax, Praktica, Mamiya, Zenit) can be used on for Nikon AI cameras.
There is no ROM connection on the ring so diaphragm control of the lens is set manually.
Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter.

In this case "stop-down mode" will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body. You can shoot with manual mode or aperture priority mode.
Superior quality, outstanding class and precise design
Allows infinity focus
This adapter ring allows you to use the M42 lens in the body of the Nikon F camera
Material: Aluminum alloy/metal
Color: Black
Suitable: for Nikon DSLR and Film SLR (as long as the body takes Nikon AF lens)
Item size: 6cm / 2.4in
Suitable for Nikon D5000 D3100 D3000

Package Contents:
1 x M42 Nikon F Lens Mount Adapter Ring (with optical glass)
1 x back cover
1 x Lens Mount Adapter