Leica SUMMICRON 50mm f2 Lens Collapsible screw mount LTM RADIOACTIVE + M adapter
This is one of the more rare early Summicron 50mm lenses, which uses thorium and or lanthanum glass elements, giving it the slightly yellow hue. Lots of info about these online if you wanted to do your own research.
This lens includes an original/genuine and correct Leica LTM to M adapter.
Focus and aperture is smooth throughout the range.
Includes original front and rear caps.
Glass is generally clean, though there is some minor artifacts visible inside along the edge (1-2mm). This WILL NOT affect image quality.