BjarniM Posted November 22, 2015 Share #1 Posted November 22, 2015 Advertisement (gone after registration) This morning my M246 was acting strange when i was focusing. Maybe not so easy to explain, but i can try. When i was turning the focus ring on the lens from ∞ towards 0.7 m the viewfinder pattern/focus mechanism on the camera acted like it was 'sticky' - it locked in a certain distance and didn't respond. The first time it happened, the focus was locked on around 2 meters, and the pattern to focus with, didn't respond when i tried to focus on 1 meter where my object was. I turned the focus ring back and forth 3-4 times, and suddenly it was released from the distance where it was locked. I could hear it clearly with a 'click' as well, when it de-snapped and was released again. I switched the camera on-off a few times, and the strange thing is that i could provoke it to happen 7-8 times, even when the camera was switched off. I looked in the viewfinder, and the pattern/focus mechanism was acting 'sticky' at different distances between 3 - 0.8 meters, and would not release (or anti stick) before i turned the focus ring on the lens in the opposite direction, towards infinity again. What's happening? Have you experienced something like this? Link to post Share on other sites More sharing options...
Advertisement Posted November 22, 2015 Posted November 22, 2015 Hi BjarniM, Take a look here Sticky focus/viewfinder: Have you experienced this?. I'm sure you'll find what you were looking for!
LocalHero1953 Posted November 22, 2015 Share #2 Posted November 22, 2015 Never heard of it happening. But it sounds like some grunge in the RF linkages in the body, or a faulty bearing. Unless you can see some obvious foreign object in the body. then it needs professional servicing. Link to post Share on other sites More sharing options...
BjarniM Posted November 22, 2015 Author Share #3 Posted November 22, 2015 Unless you can see some obvious foreign object in the body. then it needs professional servicing. No, no foreign object. Link to post Share on other sites More sharing options...
250swb Posted November 22, 2015 Share #4 Posted November 22, 2015 Is the lens mounted correctly? Steve Link to post Share on other sites More sharing options...
BjarniM Posted November 22, 2015 Author Share #5 Posted November 22, 2015 Is the lens mounted correctly? Steve Yes, i did check that. Link to post Share on other sites More sharing options...
BjarniM Posted November 23, 2015 Author Share #6 Posted November 23, 2015 Anyone else experienced the problem? Link to post Share on other sites More sharing options...
250swb Posted November 24, 2015 Share #7 Posted November 24, 2015 Advertisement (gone after registration) So what does it feel like if you just push the focus arm, can you feel any undue resistance? Or is the lens flange centred, sometimes they can rotate and cause the rear lens baffle to touch the focus arm. Steve Link to post Share on other sites More sharing options...
BjarniM Posted November 24, 2015 Author Share #8 Posted November 24, 2015 So what does it feel like if you just push the focus arm, can you feel any undue resistance? Steve Yes, there is some unwanted resistance. I took a closer look just now, and i'm somewhat concerned at the moment. Everything i see in the viewfinder, is moving. If the attached lens is set on infinety, and i move the focus to 0.7 meter, both the framing lines and the focus rectangle/pattern is moving around 5-10% towards right-bottom direction. Link to post Share on other sites More sharing options...
wattsy Posted November 25, 2015 Share #9 Posted November 25, 2015 Everything i see in the viewfinder, is moving. If the attached lens is set on infinety, and i move the focus to 0.7 meter, both the framing lines and the focus rectangle/pattern is moving around 5-10% towards right-bottom direction. Yes, that is the parallax correction. Every Leica M camera I've ever had does this. Link to post Share on other sites More sharing options...
BjarniM Posted November 25, 2015 Author Share #10 Posted November 25, 2015 Yes, that is the parallax correction. Every Leica M camera I've ever had does this. Yes, but what concerns me, is that it gets all locked up at different distances. Link to post Share on other sites More sharing options...
jaapv Posted November 25, 2015 Share #11 Posted November 25, 2015 Is the focus lever in the mount bent out of true? In that case it will not engage properly with the focus cam on the lens. Link to post Share on other sites More sharing options...
BjarniM Posted November 25, 2015 Author Share #12 Posted November 25, 2015 Is the focus lever in the mount bent out of true? In that case it will not engage properly with the focus cam on the lens. I'm not sure, since i've never inspected all the different parts in my cameras so close. I could take a look, but i'm not sure how to see if that's the case. Is it obvious to see if its bent? I don't know that could have happened, since only one lens has been mounted on the camera and i take good care of things. Link to post Share on other sites More sharing options...
menos I M6 Posted December 4, 2015 Share #13 Posted December 4, 2015 It can happen that the focus mechanism in the camera body will seize up and hence will only move with much more force on the lens' focussing tab/ ring. It is time for a trip to Leica (the camera body). So far it happened only to one body from many M bodies I used - a Leica M9 which was last in service about a year ago. It is flagged and I will bring it in next trip around. It can be clearly felt with certain lenses, when comparing the same lens on the effected camera body and other bodies. Have a Leica specialist in a shop check it out for you. Link to post Share on other sites More sharing options...
BjarniM Posted December 28, 2015 Author Share #14 Posted December 28, 2015 A little update. I did send the camera to Leica in Germany for a service check. They decided to send me a new camera. So i have my fingers crossed that there will not be another error with the camera. Link to post Share on other sites More sharing options...
dante Posted January 15, 2016 Share #15 Posted January 15, 2016 I've had this causes by lenses - the older Nikkor telephotos for Leica (like the 105 and 135) have a rangefinder linkage that is a tab riding a spiral groove inside the lens barrel. It is spring-loaded to stay as forward as possible, and when the sliding tab's track grits up, the RF linkage will decouple as you focus to the near range. But a tiny drop of oil resolves that. D Link to post Share on other sites More sharing options...
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