cam
the need for speed
Because the base length of the R-D1's rangefinder is too short to get the same hit rate with faster lenses. The M8 is not much better from this viewpoint as its finder magnification (.68x) is much wider than that of the R-D1 (1:1). In both cases a magnifier like the 1.25x Leica or the 1.30x Megaperls will help though.
Yes a magnifier is a big help in focusing shallow DOF lenses on the R-D1. AFAIK the Leica adapter doesn't fit the R-D1 (or Bessas or ZI). But because of patent restrictions, Dirk can't sell the Megaperls adapter in the US for use on a RF. That 1.30x adapter fits Nikon digital bodies, though.
that makes sense... i have been using Megaperls magnifier and *love* it with the 50 Lux when i'm able to take to the time to compose and focus wide open. for the street, using my 35mm, i'm not as crazy about it as i seem to knock the adjustment out quite frequently...
i'm very tempted to bid on that Canon lens after seeing the examples here, but i'm kind of loathe to bid against Mani before his holiday... then again, he's got the Nocti (my maor lust) so how can i feel sorry for him?