Archived posting to the Leica Users Group, 1998/07/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Where are these ports?? Francesco At 01:55 PM 7/2/98 -0600, you wrote: >>Could someone please explain? >> >>My M6 rangfinder is "off" vertically (left to right/right to left) at >>infinity. I haven't noticed a problem with photos and yesterday ran a very >>quick and very dirty "test" by starting at 28" with my 50 summicron, and >>then backing away from a fixed object and taking a photo at each distance >>mark on the lens, including infinity. All were "sharp." So what gives? >> >>Thanks > >Well. if it works, don't fix it. >However, I don't understand your description of how it's off. "vertically >(left to right/right to left)" sounds like an oxymoron to me. To me, >vertical misalignment means the images are out of register up and down, >while horizontal misalignment means that the focus obtained by the >rangefinder is different than the best focus at the film plane. > It sounds like you are describing horizontal misalignment. One >good way to adjust a rangefinder horizontally is to put the lens at >infinity focus. (Checking to be sure the lens is really at infinity focus >is another matter altogether.) Put the camera on a tripod and aim the >middle of the rangefinder patch at some very contrasty subject very far >away, preferably well over a mile. Find the correct port for adjusting the >horizontal rangefinder alignment, and turn it with a screwdriver until the >images are perfectly superimposed. Some subjects are better than others >for doing this. A star is pretty good. A bright small object at the >horizon is good, too. Vertical misalignment can be adjusted using the >same subject. >Mark Walberg >