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M_currie
Tinkerer
Username: M_currie

Post Number: 291
Registered: 07-2006

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Votes: 0

Posted on Friday, December 07, 2012 - 09:04 pm:   

Does the focusing ring indicate the proper limits of focus when taken to its limits (in other words, does the infinity mark line up right when it's focused to its farthest setting, and the closest mark when at its closest)? If not, then it might be a simple problem with the focusing ring having gotten shifted, and slightly loosening the ring screws (just a little) should allow you to turn it back by going to a limit, then a bit past, until the lines line up. If the reading stops before you get close enough, or goes past infinity, focus close and then some to return it to the mark. If it does not go all the way to infinity, focus to infinity and keep turning the ring until the marks line up. Loosen the screws only enough to allow some movement, not enough for the ring to come loose or shift forward and back.

If the focus is truly off - in other words, if the ring lines up but the lens itself is not focusing on infinity - then you definitely need to get deeper, especially you bought it this way or know of some damage. It's very easy to put a lens together wrong. Most focusing threads are "multi-start" threads: there will be several places to start screwing it together, but only one is right.

A Leica lens is rather expensive, so I'd take it somewhere. Especially if your Leica is a II or III without a removable back. Adjusting a lens on one of these is very daunting, if not downright impossible.

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