my English comes to its limits here too. I own a special version of the 2/50 Summicron. It has two ranges. One normal from 1m to infinity and one from about 50cm to 90cm. For this "near macro" range the rangefinder has to be corrected with a special attachment which in German is called "Brille" or eye glasses or maybe goggles in English. Its shape indeed resembles to eye glasses, as it consists of prismatic lenses in front of the finder and the rangefinder window. One is rectangular in shape, the other is round and attached with a cylindrical ... I don't know, may be bracket is the right English term. In German it is "Fassung". If you screw loose this "bracket" a bit, you can turn the prismatic lens from the back. So far I have found out what to do.
My problem is: If I look through the finder and adjust the taking lens to an object in say about 60cm distance, the scale will show 60cm. All is right so far except there is something what I now know as skew between an edge of the object and its rangefinder picture of about 1°. If I adjust the prismatic lens in front of the rangefinder window such that there is no skew. The scale of the lens shows the wrong distance.
So all I need to know is whether this is ok or whether there should be a perfect alignment in the rangefinder patch, as it is case in normal operation between 1m and infinity.
I hope I could make it more clear now. I usually need some time to get familiar with terms needed to talk about topics new to me.
Last edited by Ulrich Drolshagen; 04-26-2013 at 04:55 PM. Click to view previous post history.