Image quality on the M42-Nikon adapter with corrective lens. | Happy
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
HELIOS 44 M 2/58 Mm Cine Lens Anamorphic Boke Mount CANON - Etsy