David, I've still got, and regularly use, an R4SP, (my favorite), an R5, and an R6.2, plus a number of lenses, winders, drives, bellows, both R & M and all necessary adapters, plus my father's old M3 DS, w/preview and meter MC and DR 50 f/2 summicron. AND, my originally purchased, (new), while stationed in Japan in the 60's, Petri 7S w/45mm f/1.8 lens. The selenium meter still works perfectly and checks out linear, to within 1/2 stop of my Gossen Ultra-Pro! Just don't shoot into the sun! I'm just not happy with R8's Art