Archived posting to the Leica Users Group, 2002/07/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I have a fairly motley collection of lenses, but I have noticed that the longer lenses, 85-135 focus a little differently than the 35-50s. I wouldn't be surprised if my lenses needed a little calibration. I just set the focus of the body at a happy medium. They are pretty close. Mike D Simon Lamb wrote: > I used the 24mm, 50mm, 90mm and 135mm lenses yesterday and noticed > differences when focusing at infinity. > > With the 50mm and 90mm lenses I saw the split image in the focus area > coincide when I focused on a tree on the horizon, a few miles away from > where I was standing. With the 24mm and 135mm lenses, the images did not > coincide when focusing on the tree, and when I focused on the window frame > of a house about 1/4 mile away, the images still did not appear to coincide. > I did not find out at what distance the coincidence did occur but it was no > where near infinity and probably less than an object 1/4 mile away. > > Can the rangefinder be calibrated for every lens so that the focus is set > properly and so that the coincidence of the split image will happen only > when focusing at an object far away (infinity)? Or is there only one > calibration that can be made, and given that I have two lenses that focus > properly at infinity, will I have to accept that the 24mm and 135mm do not? > > Also, does the fact that the 24mm and 135mm lenses do not focus properly at > infinity mean that they will not be focusing correctly at any distance? I > have not seen any images out of focus on pictures taken at relatively close > range but that is not to say they are precisely focused. > > Thanks. > > Simon > > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > > - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html