I want a light three lens set built around the 35 2D. In other words I need a shorter and longer fixed focal length lens. Probably the 20 2.8 for the shorter. The longer is a problem. In classic 35mm terms the set would have been 35, 50, and 135....that would suggest the 85 as the replacement but the jump from 35 to 85 is pretty huge so maybe the 50......but the 50 is too close to the 35. Hmmm, maybe the 60 micro?.....