Hi guys, I love my dual range summicron just not a huge fan of a shiny chrome lens hanging off my black paint MP. Wish a black version was made that was not so rare to fetch a $6000 price tag. Anyways I currently grabbed a version IV tabbed canadian summicron from B&H that I plan on running a few rolls through before I decide whether to keep it or not. Glass seems to be in tip top shape, physical condition is about a 7. What I'm wondering is if all this talk about high contrast on this modern version is really that huge of a difference from a DR. I shoot mainly tri-x b&w and love what I get from the DR and am often amazed at the results at times from a lens of such age. I had it CLA'd by DAG years ago and I would say it is in near mint condition. So is the IV really that much more contrasty? Does tonal seperation really mean anything more than shadow detail? If the IV is more contrasty can't I just over-expose and underdevelop a bit to get the same effect? Does the center sharpness of the DR at f2 really look different on a IV? The IV lens itself is nice and small and black so more discreet. Not nearly built to the same specs mechanically as the DR but smooth focusing and I like the hood. Will I kill myself if I get rid of the DR? Let me know what you guys think. I guess I can always get an M3 or a chrome MP and have the looks but I kind of prefer the black on black.