Archived posting to the Leica Users Group, 2017/01/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Before Xmas, I sent my 90mm Summicron to a repair-man in Japan to fix the front-focusing problem. By front-focusing, I mean that when I the rangefinder makes it look like the lens is focussed on the eye, the focus of the lens is actually on the tip of the nose, or even a little closer to the lens. The repair-man said a few days ago that he took the lens completely apart and couldn't come up with a way to fix it! It's back in my hands today, and, as the man said, it's still front-focussing. I tried Dante Stella's suggestion of adding Scotch tape to the focus cam, intending to add 3 or 4 coats of nail varnish if that helped, but the tape only increased the front focussing problem. Am I right to deduce from this that making the focus cam protrude a little more (by, say, adding nail varnish) will bring the focus nearer? Here is a photo showing where I am putting the Scotch tape: https://flic.kr/p/PHj5ho Without the tape, the lens is front-focussing about 2 or 3 cms from about a 120 cms away. With the Scotch tape, this becomes worse, front-focussing by 4 or 5 cms. The repair-man in Japan was recommended by a colleague who also uses Leicas, but he is stumped at how to correct this lens. I asked Leica Japan too, but they say they can't correct lenses that old, and don't have the parts. I didn't know you needed new parts to calibrate a lens. I suppose that's a stock answer for anything to do with older lenses. So, I don't know what to do. Am I not properly understanding Dante's suggestion? Should I send to someone in the USA, such as Dan Goldman? What is his turn-aroud time like, and is there anyone a little faster but still competent? Still looking for advice! Peter