Helios 44/2 on Nikon F mount infinity focus achieved without extra glass adapter | Nikon DSLR and M42 lenses (all Nikon DSLR from 2006 onwards) | Flickr
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Adapter Ring Infinity Focus With Glass For M42 Lens To Nikon D3 D5 D90 D80 D500 D600 D800 D5000 D3000 D3100 D7200 Camera - Lens Adapter - AliExpress