jaapv Posted February 23, 2009 Share #161 Posted February 23, 2009 Advertisement (gone after registration) Yes it can have shifted, and the lens can easily be adjusted. The only thing needed is a collimator and maybe (but not nessesarily) some shims. See your local Leica repairman. Quote Link to post Share on other sites More sharing options...
Advertisement Posted February 23, 2009 Posted February 23, 2009 Hi jaapv, Take a look here new backfocus thread-solution. I'm sure you'll find what you were looking for!
Shootist Posted February 23, 2009 Share #162 Posted February 23, 2009 So, as you say, my M8 gives correct focus only with one lens. And I only have two lenses! I have 12 lenses and all of them focus correctly on both my M8's. So it would seem that summarit lens is off. Quote Link to post Share on other sites More sharing options...
alex7075 Posted February 23, 2009 Share #163 Posted February 23, 2009 Thank you for your replies. Already feeling better thinking about a properly working system. I'll keep the forum informed also in case somebody else will have a similar problem. Best Regards, Alex Quote Link to post Share on other sites More sharing options...
JHAG Posted February 23, 2009 Share #164 Posted February 23, 2009 Alex, I checked Suffren new website. Their Leica repair page mentions every M, except 7 and 8. 7 would'nt be a problem, but 8 ? I'm not sure they do back/frontfocussing adjustments. Quote Link to post Share on other sites More sharing options...
alex7075 Posted February 23, 2009 Share #165 Posted February 23, 2009 (edited) Alex,I checked Suffren new website. Their Leica repair page mentions every M, except 7 and 8. 7 would'nt be a problem, but 8 ? I'm not sure they do back/frontfocussing adjustments. Thanks for your input. I will try and go there tomorrow morning and will report on this page. They already fixed once the rangefinder of my M8 instantly. Edited February 23, 2009 by alex7075 incomplete Quote Link to post Share on other sites More sharing options...
marcosadun Posted July 29, 2009 Share #166 Posted July 29, 2009 Hello everybody... I am a new Leica M8 user. And I am fighting as well with the back focusing problem... I see that correct the problem with the infinite is easy... but I didnt understand yet hot to fix the problem to short focal lenght. To infinite my len ( summicron 35mm ) is working fine... but when I try to focus at 1 meter or so on the view finder is not focusing correctly... Do I need to use also in this case the alley key? Or what? Or I have to un screw the other screw? It is pretty tide... and I am afraid to make some major mistake... Thanks! Marco Quote Link to post Share on other sites More sharing options...
jaapv Posted July 29, 2009 Share #167 Posted July 29, 2009 Advertisement (gone after registration) There are three adjustment points. The adjustment can only be done correctly by an expert. Trying to do it by twisting the roller for infinity throws the rest of the adjustment out of kilter, specifically close focussing. Quote Link to post Share on other sites More sharing options...
marcosadun Posted July 30, 2009 Share #168 Posted July 30, 2009 Mmm... "correct" the infinite with the alley key it is not difficult, as I see... takes only some correction and et voila'. I dont know how to engage the close focus... And anyay... still not clear if it is a problem that I will see again changing len or not. I mean that now I have only one len... a Summicron 35mm f/2, but I would like to buy also a 90mm sometimes... do I will able to use the viewfinder fucus properly?? I dont know... Quote Link to post Share on other sites More sharing options...
jaapv Posted July 30, 2009 Share #169 Posted July 30, 2009 Unfortunately, the Allen key "correction" has upset the accuracy of your midrange and close-focus and probably the adaptation to other lenses. To adjust your M camera correctly you need: The appropriate tools, A reference lens A collimator or optical bench The relevant knowledge. Quote Link to post Share on other sites More sharing options...
marcosadun Posted July 30, 2009 Share #170 Posted July 30, 2009 understood that. So all the others that make the adjustment them self have choosen a homemade solution and not "optimal". thats correct? The only solution to have the camera in perfect condition is to send the camera back to Leica in your opinion? Marco Quote Link to post Share on other sites More sharing options...
jaapv Posted July 30, 2009 Share #171 Posted July 30, 2009 Not specifically to Leica. Any competent Leica repairman should be able to do as least as good a job as Leica. I see you are in Italy. I understand there are a number of them in your country. Maybe one of our Italian friends could chip in with a recommendation? Quote Link to post Share on other sites More sharing options...
ashrafazlan Posted July 10, 2010 Share #172 Posted July 10, 2010 Sorry for bumping this thread, but I've got a few questions to ask before I attempt this 1) Should I use the allen key and turn until (a)the focus patch coincides at infinity, or do I adjust it till ( I get sharp focus at infinity (even if the focus patch doesn't coincide) 2) How would I adjust focus for something at minimum distance using this technique? Wouldn't the actual minimum distance point change everytime I adjust it, therefore making it impossible to adjust unless I (a) get the infinity focus to coincide first and then do minor tweaking @ minimum focus to get correctly focused images or ( premeasuring the distance between camera and object for minimum focusing distance first before doing any adjustments. Any replies would me much appreciated. Closest Leica technician from my location is in Hong Kong, and I just don't have the funds right now to afford it. Quote Link to post Share on other sites More sharing options...
Maarten Posted July 10, 2010 Share #173 Posted July 10, 2010 Julian Thompson explain all this in excellent detail on http://www.l-camera-forum.com/leica-forum/leica-m9-forum/122176-m9-coincidence-infinity.html. Maarten Quote Link to post Share on other sites More sharing options...
ndjambrose Posted July 13, 2010 Share #174 Posted July 13, 2010 Just thought I'd comment that I tried this myself with good results. I had similar problems with three lenses and figured an infinity adjustment was worth a go. My starting point was a 75/2 with 5 feet back focus at medium distances and 20 feet back focus at longer distances, although accurate at close range; a 50/2 accurate at all distances, although with non-convergence of RF image at infinity; a 90/2.8 with accurate close range and 20 feet back focus at infinity. After a couple of adjustments my end position is 75/2 accurate at all distances; a 50/2 accurate at all distances with slight improvement to infinity RF image; a 90/2.8 with one inch back focus at 1 meter, and accurate at all other distances. Overall it's a definite improvement and I am very impressed with the improvement to the 75/2. Obviously a cam adjustment is needed to cure the slight close range back focus on the 90, but even so, I'm happy to swap a one inch inaccuracy for a gain of 20 feet! Quote Link to post Share on other sites More sharing options...
photokalia Posted December 12, 2010 Share #175 Posted December 12, 2010 Thanks for the tips on this thread. I bought an M8 recently, and I was dismayed to realise that it was off focus. I ended up compensating by increasing the DOF and deliberately throwing my focus off. In my case, I'm sure it was the camera since ALL my lenses were off focus in the same way, and I never had this problem on my M6 TTL. After reading this thread, I checked the infinity focus and realised that the rangefinder wasn't able to focus to infinity! So I whipped out the allen key, took a deep breath, did a quick adjustment and now everything is fine. I'm not a pixel peeper, and I'm sure the focus could be fine-tuned, but this quick adjustment saves me a CLA and loss of the use of my M8 for a few weeks! Thanks guys! Quote Link to post Share on other sites More sharing options...
epand56 Posted December 15, 2010 Share #176 Posted December 15, 2010 Sorry if I'm back with it again.Having tested and re-tested, both 35 and 50 are on focus now. Noctilux is slightly front-focussing fully open and slightly back-focussing at 2.8 But my elmarit 90 is not : fully open, it's front-focussing a lot, and slightly back-focussing at 5.6. All lenses are nexw or less than 4 years old. Johan, that's what exactly happened to me when I first (and last) adjusted my M8 with the 2mm wrench. I had a couple lenses backfocusing a little and so performed the adjustment with an expert friend. Short lenses where fine but I had the bad surprise to see my Elmarit 90 gone totally out of focus (several meters in front of distant subjects). Sent the camera to Solms along with the 90 and anything is ok since. I still have some lens very slightly backfocusing (mainly CV lenses) but learned how to live with it. Quote Link to post Share on other sites More sharing options...
jaapv Posted December 15, 2010 Share #177 Posted December 15, 2010 Maybe the friend was not 100% expert - this is what may happen with the Allen wrench method. Quote Link to post Share on other sites More sharing options...
epand56 Posted December 20, 2010 Share #178 Posted December 20, 2010 Maybe the friend was not 100% expert - this is what may happen with the Allen wrench method. Jaap, I think it was misalligned before my friend performed the adjustment. Other three bought in the same shop were the same. It was three friends and we all had to send to Solms for reallignment. You know, Italian carriers are not famous for their care with packages Quote Link to post Share on other sites More sharing options...
sean1967 Posted March 20, 2011 Share #179 Posted March 20, 2011 Hello everyone Just sorted my M8 backfocus issue thanks to this thread Cheers Sean Quote Link to post Share on other sites More sharing options...
drstefanlenz Posted November 8, 2011 Share #180 Posted November 8, 2011 hello, works easy, backfocus on noctilux 1.0 occurs quite often, takes a few minutes to adjust Quote Link to post Share on other sites More sharing options...
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