I got a 2/50 Summicron DR with misaligned goggles. I found out that I can screw the cylindrical frame on the front loose a little and turn the prism from the back. This way I get pretty close in Adjustment but either the distance is right or there is a small deviation of about appr. 1 degree left. Is this normal or should the rangefinder spot be perfectly in match if the distance is right?