Helios 44-2 58mm f2 Review | A King Of Character | Alik Griffin
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: The Helios 44-2 58/2 Lens in M42 Mount – davidde.com
Helios with ultrasonic motor and image stabilizer | Radozhiva
Fixing the focus to infinity issue of the Helios 44-2 on M42 to Nikon F mount adapter - YouTube
HELIOS 44-2 Lens Trioplan Modified, Mount adapter for SONY NEX, Canon EOS, Nikon | eBay
Mod: Autofocus Helios-44 for Nikon pt2 | Richard Haw's Classic Nikon Repair and Review