Archived posting to the Leica Users Group, 1997/12/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I have a current 90/2 and a mid-70's 90/2.8 and at f/5.6 there's no discernable diffrerence between them, sharpness-wise (contrast is another issue); I've used a current 90/2.8 and ditto. If the lens isn't visibly cloudy inside, before I'd spend the money to send it (or the camera) off for repair, I would shoot some test frames with the camera on a solid tripod, at various apertures. Pick a flat target (like a poster on a wall) and make sure the camera back is parallel to the wall on all axes. If you still notice any softness, aside from a very slight bit in the corners at f/2, then perhaps there is a repair problem. Otherwise, what you've been seeing may be attributable to the shallower DOF and greater susceptibility to camera-shake of a 90mm lens (particularly a heavy one such as the Summicron). Doc