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Found 2 results

  1. I have recently purchased a used 75mm Summilux f/1.4 which has an issue with back focusing. I did some tests today, and from minimum focusing distance to about 1.5 meters, the focus is very good. Then the back focusing is more and more visible at longer distances. At 2 meters the focus is about 5 cm behind, and at 3 meters it back focuses maybe 30 cm. I can't see any difference at different apertures. What is the best thing to do? Send it to Leica for an adjustment? Do they need the camera as well? (hope not). Or should I just find a way to live with it, e.g. try to remember how much nearer I have to focus at different distances? I have planned to buy a Visoflex, but currently I can't afford it.
  2. I have recently got my 75mm Summilux back from service because of back focusing. It is a bit better, but still far from perfect. At a distance of one meter, the focus is very good. But at three meters the focus is about 10 cm behind. And the back focusing increases even more at longer distances. Is this a well known problem for this lens? Shouldn't it be possible to get a better result, or is a visoflex the only safe alternative for accurate focus? I will mainly use this lens wide open. Would it be easier to calibrate it for f/1.4 only, instad of all apertures? Do I have to pay for another service if I am not satisfied?
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