Thanks Andrew , My father was fascinated by things Russian. When I was a kid in the middle of the cold war it used to baffle me that such things were so commonly available considering the general hatred of the nasty Russians. The Helios lens I have came from one of his Zenit cameras and really impresses me compared to the few modern lenses I have tried, it's a shame that it ends up being 80mm due to the crop factor on APS-c.