I am looking for some Leica R lenses to adopt to Canon.
There seems to be a lot of them.
Are there any of these lenses that ate known as "super-permormers"
in the R-line (regardless of focal length).
Are the Leica branded lenses or the Leitz lenses best?
All Leica lenses are good, but this doesn't mean that you don't have even better solutions ...sometimes! In reality, the only R lenses that are currently worthwhile, are ALL THE STANDARDS and ALL THE PORTRAITS (ie. 80-90mm), the only other one I would consider is the "28mm f2.8 Elmarit", if I was to go wider than that (where is the "Canon problem"), I would go for the Contax N 17-35mm f2.8 (for its 17-24mm performance) and for the Contax C645 lenses for the "tele" region. For the later two (the 17-35 and the "teles"), I would ask "Conorus" of Canada to convert the wide-angle zoom (17-35) and also to convert for me the Nam-1 adapter that was originally meant, to use the C645 lenses on Contax N 35mm. This way, I could save much of the cost that would be required to have both DSLR and MF systems well equipped, while at the same time, retain maximum lens compatibility (the "Conorus" convertions retain all lens/camera functions & AF). For example, if I was using Canon, I would use the Contax 17-35 for UWA, the Elmarit 28 for "general purpose" WA, the Canon 24-70 for standard zoom, the "Sumicrons" 50 & 90mm for std and portrait respectively and the Contax C645 120mm macro, 140mm f2.8 & 210mm f4 for "teles" via a Conorus NAM-1 adapter. This would give me the opportunity to retain my C645, add the 35mm & 55mm Contax 645 lenses for it, ....and perhaps the 80mm f2 std for C645 could replace my "portrait 80-90mm" from the Leicas. This is a very efficient system for somebody to have both DSLR and MF, in superb quality, covering most of the needed range, while at the same time save space and lens choice. Unfortunately I am using Nikon (although I've many times have been tempted from the above solution), thus, I can only recommend what I think is perfection (the above + a MFDB for the C645). If the back happens to be a "multishot" one, as is mine..., and you can additionally use the back on a view (or Fuji GX680) camera, as I do..., then with 2-3 more lenses for the later (the view camera) you are on the top of the world. Regards, Theodoros. www.fotometria.gr
P.S. The superb Zeiss 21mm could replace the Contax 17-35mm choice...