M42 Pentax screw mount Lens to Nikon F Ai-s Camera adapter Ring w Glass Infinity | eBay
LENS ADAPTERS M42 lens to Nikon Camera Mount Adapter - K&F Concept
M42 Lens To Nikon Camera F Mount Adapter Ring With Glass Infinity Focus – UK Camera Equipment
M42 Screw Lens to Nikon AI F Mount Camera Adapter Ring With Glass Focus Infinity | eBay
M42 to Nikon Adapter Without Damaging Your Camera Mount or Mirror - YouTube
Kiwifotos Lens Mount Adapter (Mount M42 lenses on Nikon F Mount Camera Body - Film or Digital SLR Compatible) - Extension Tubes & Lens Adapters - ShaShinKi
Amazon.com : K&F Concept M42-Nikon Lens Mount Adapter Compatible with M42 Screw Lens to Nikon Camera Body : Electronics