You can use this adapter to mount M42 screw-mount lenses(from Pentax, Praktica, Zenit) with your Nikon AI cameras
This adapter build in the correctional glass, which make the adapter allow focus to infinity.
You can shoot with manual mode or aperture priority mode
The auto focusing can't work with the adapter ring

Technical Details

Product Details

Package Dimensions
Width : 4.33 inch
Height : 1.18 inch
Length : 7.09 inch

Shipping Weight: 0 ounce (View shipping rates and policies)

ASIN : B075JZV8TZ