Just to say that my M8 is almost permanently wedded to my Helios or ex-Brian Sweeney J3 / Sonnar [ Jonnar ? ] hybrid , having miss-laid my prewar collapsible Sonnar [ how on earth did I lose that ? ] the odd J8 / J8m gets a look in sometimes .
The great thing about the Aamdeo mount is that Kiev lenses seem more solid than the screw J8s and the focusing is through the mount which creates a quality feel in the cheapest USSR lenses .
I am more than content with just the nom 67mm crop factor on emMa8 , so it could well be a fixed lens camera ... but the Summitar and CV 35 f2.5 also get some attention .