I would like to choose the best compact (~400 g.) 135 mm legacy lens for my Olympus PM-1. So the question is: Which of the following lenses is the sharpest and has least chromatic aberrations @ ~f/3.5 on MTF: 1. Hexanon 3.2 (390 g., 95 mm length, 5 elements in 4 groups, newest version) 2. Olympus OM 2.8 (360 g., 80 mm length, 5/5) 3. Canon FD 3.5 (385 g., 85 mm, 4/4, 1976 version - S.C. II) 4. Konica AR Tokina 2.8 (473 g., 95 mm, not RMC) I like handling of FD 3.5 most so I am interested in FD 2.5 (heavy) and nFD 2.8 (light, but more expensive) too. Are there any better and affordable lenses? Does FD lenses work well on MTF? Does OM really has biggest problems with CA?