My R lenses are all current 3 cam with one of my 50s being a Canadian cron.
Yes I was refering to the German made lenses in particular. All though I found some of the Minolta lenses were suprisingly good. Personally, I've found the Canadian build lenses don't produce the same quality charateristics as the German manufactured ones. That is not to say they are bad, just different to my eye anyway. I should add that I don't test gear and can not claim to be a reliable authority in these matters. My observations are based more on the impresion I get from the prints. By in large B+W with some Kodachrome.
The situation was that I had unfetted access to a rather nice Leica collection and could just about play with what I liked. Pretty well the only Leicas I have not had a chance to put film through are the M6TTL, R5 and R7, and 8 and '0'. This was different situation to subjectively evaluation the performance and handling of equipment.
The 'flex or not to flex' question is now a moot point as I am committed to the R6. Which does the job nicely. Because I come from a M3 and view camera background the metering compatibility of earlier cameras and newer lens doesn't faze me as my intincts are to go for the hand meter first.
Let face it, Leica is pretty well all good and relaible stuff. In the main Leicas are nicer to use than other brands, which I believe makes the photographer more comfortable with the equipment thus helping to inspire one to make better images.
When I pick up a Nikon FM2 or 3A I go ugh. My response to R4 R6 type cameras is mmm Ok, but the Leicaflexes, and the R9, make me go-yes lets do some work!!!
The main point is, and I think most would agree, that there is a market for a mech. SLR, and preferably one with a horizontal shutter travel.
craig