When I was doing a project for about 6 years, I had the 28 Summicron, 35 Lux Asph, 50 Lux Asph and a TE 90 2.8. If you are at all considering ponying up for the 35 Lux, do it, the lens is simply in another league. I would get one again if I were not working with mostly a 50 Lux Asph on my M3. Thanks for this. I think what it basically boils down to is what one's specific needs or wants are from any gear. In my case, the 35 gets used on my M3 with a small piece of tape over the frame line window and I use it "Full Frame". So it only gets used about 10% of the time. So far the Skopar has been great in that mode due to how tiny it is and how it does not protrude into the viewfinder hardly at all. The Nokton will afford me the same unobstructed view, lenses like the Ultron or ZM F2 Biogon will start to be rather intrusive... And as it stands right now, the 50 Lux Asph is the "low light" lens while the 35 is medium to bright light, even with 400 speed films. So hypothetically speaking, if I can put on the CV 35 1.4 and use it at EV 12-17 at F4 and up and it will pretty much do what the Skopar does, then it becomes a lot more versatile if I can go indoors and then I use it at 2.8 and wider for general documentary and people work. F2 is where I wish the Skopar was and 1.4 is pure gravy. All I ever use in this camera is 400 speed film, so I hardly ever use or need to use a meter anymore, I know that F2 gets to be right on the edge for lower light and 1.4 seals the deal... Ideally a 35 Summicron Asph would be the ticket, but 2K for a lens I only use 10% of the time starts to look a bit excessive on the balance sheet, not that a new chrome 50 lux asph did not... I guess I will just have to try it to make the final call....