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
Review: KMZ Helios-44 58mm 2.0 - phillipreeve.net
MC HELIOS-44M-4 58mm 1:2 lens information and sample photos - Nikon Rumors