Fixing the focus to infinity issue of the Helios 44-2 on M42 to Nikon F mount adapter - YouTube
Review: KMZ Helios-44 58mm 2.0 - phillipreeve.net
Review: KMZ Helios-44 58mm 2.0 - phillipreeve.net
Helios 44-2 to Nikon F mount with infinity focus and accessories - YouTube
Helios 44-2 on nikon FX: possible and how?: Nikon SLR Lens Talk Forum: Digital Photography Review
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
The Russian Zenit Helios 40-2 85mm f/1.5 lens is now available with Nikon F- mount - Nikon Rumors
M42-Nikon Adapter Ring with Glass. Quality Test. Lensbeam
Helios 44–2 lens for Nikon F mount | Yeah, nah, aye
US Seller Helios 44-2 58mm f2 Nikon F Mount INFINITY FOCUS Manual Russian Lens | eBay
Helios-44-2 58mm F2 Cine w/ Neutral Anamorphic Bokeh & Flare – TerPhoto Store
Rent a Zenit Helios 44-2 58mm f/2 Prime Lens USSR (Sony, Canon, Fuji, Nikon, MFT), Best Prices | ShareGrid Los Angeles, CA