Helios 44–2 lens for Nikon F mount | Yeah, nah, aye
Review: KMZ Helios-44 58mm 2.0 - phillipreeve.net
MC HELIOS-44M-4 58mm 1:2 lens information and sample photos - Nikon Rumors
Helios 44-2 M42 Lens to Nikon Z Mount Mirrorless Z30 Z50 Z5 Z6 Z7 ZFC ZF Adapter | eBay
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
Adventures on Film
Helios 44–2 lens for Nikon F mount | Yeah, nah, aye
Review: KMZ Helios-44 58mm 2.0 - phillipreeve.net
Fixing the focus to infinity issue of the Helios 44-2 on M42 to Nikon F mount adapter - YouTube