What I'd meant previously was that my Summilux-R 35 wasn't extremely sharp wide open... and at least at first glance, this SLRM lens seems to have more 'pop' on the open end. I'm curious how much of SLRM's optics still originate from machine vision lenses... I know Navitar, for one, make a full set of 0.95 primes (that aren't cheap). Whatever the source, they are steadily and markedly improving from their previous CCTV toy lenses.
Leica R's aren't always cheap, but it's more possible to find good used samples vs. M's... you can get most of the Summicrons (f2) in the $500-750 range. There's a lot to be said for an additional USEABLE 2 stops, of course... and sometimes it's tempting to sell off my R's to buy these newer, faster, sharper lenses. I don't know if there's any scientific advantage, or just emotional attachment that prevents it. Of course, I can justify it with the advantage that most of them work on just about anything including full frame.
Leica R's aren't always cheap, but it's more possible to find good used samples vs. M's... you can get most of the Summicrons (f2) in the $500-750 range. There's a lot to be said for an additional USEABLE 2 stops, of course... and sometimes it's tempting to sell off my R's to buy these newer, faster, sharper lenses. I don't know if there's any scientific advantage, or just emotional attachment that prevents it. Of course, I can justify it with the advantage that most of them work on just about anything including full frame.