Leica designed their own metering and electronics - which unfortunately were plagued with reliability issues for the first few years of production.
Still, an R4 at the right price [with replaced boards hopefully] can be a great way to use R lenses.
Was the R4 created in cooperation with Minolta?
Edit: Never mind. I just some other replies.
Yes, a joint venture, Copal made the shutter as well. The top plate and controls are Leica design though.
The electronic issues were pretty much limited to earlier ser.no. below 1,600,000. Mine is 1615969, so looks like I shouldn't have to worry about it much, but I've read that if by now one hasn't started acting up it probably isn't very likely to or has already been repaired.
That HCB quote is brilliant......somehow only the French can say stuff like that!
Congrats on your R4 and 50mm 'cron. I've got an R4 with a Vario Elmar 35-70mm and an M5 with a Summicron 35mm f/2. How do I feel about my Leicas? I'll refer to the Henri Bresson quote someone posted a few posts back and that's that. Nothing like Leica cameras. Even the compact digital ones are amazing, never mind the digital M's. But the camera is only as good as what you create with it through your own composition.....the camera's just a tool, but you might as well have the best tools for the job!
Do those lenses work on MD mount Minoltas?
glad you enjoy it. in my 'limited testsLeica glass never convinced me, but there is more to lenses than resolution,which was what Itook as a measure.