californiajay Posted June 25, 2007 Share #41 Posted June 25, 2007 Advertisement (gone after registration) Strange...I now have 2 M8s and 4 lenses. Not one problem whatsoever! Link to post Share on other sites More sharing options...
Advertisement Posted June 25, 2007 Posted June 25, 2007 Hi californiajay, Take a look here Do any of these M8s work properly?. I'm sure you'll find what you were looking for!
billh Posted June 25, 2007 Share #42 Posted June 25, 2007 Mine seems to focus correctly with a number of lenses - so it is possible. Cheers, Sean Possible, but unusual. Sean, is there anyone you can talk with at Leica who will tell you what is going on with this back focus problem? How, and when is the rangefinder calibrated (or is it)? Are there ten people doing this, and one of them gets it right, while the others...? There must be some explanation for this hit or miss calibration problem. Clearly some work, but many others are off, and it always seems they back focus. Thanks, Bill Link to post Share on other sites More sharing options...
larry Posted June 25, 2007 Share #43 Posted June 25, 2007 This problem really seems to be a moving target. I have four lenses and all of them focus perfectly with my M8. Larry Link to post Share on other sites More sharing options...
London Lad Posted June 25, 2007 Author Share #44 Posted June 25, 2007 Mine seems to focus correctly with a number of lenses - so it is possible. Cheers, Sean I am a believer, really, honest I am.............. Link to post Share on other sites More sharing options...
rbaron Posted June 25, 2007 Share #45 Posted June 25, 2007 This problem really seems to be a moving target. I have four lenses and all of them focus perfectly with my M8. Larry It seems to me to be a chicken or egg type of puzzle. Is the problem in the M8 body or in the lens mount? Going on suspicion - without any discernible qualifications to back me up - I will guess the problem is in the lens mounts. That there is a population of lenses with wildly varying build standards and wear variables (well, widely varying within a small range but varying nonetheless) seems to me to be a more logical conclusion than a bunch of brand new M8 bodies that are far enough out of specification to cause this problem. It seems illogical to require matching of a body to a set of lenses, since the acquisition of additional bodies would seem to render the initial matching exercise no longer valid. Surely you shouldn't have to send in all your lenses and all your bodies each time you buy a new body! Of course I have been often wrong before and stand ready to be wrong once again. Will we ever know the correct answer? --Bob Link to post Share on other sites More sharing options...
London Lad Posted June 25, 2007 Author Share #46 Posted June 25, 2007 It seems to me to be a chicken or egg type of puzzle. Is the problem in the M8 body or in the lens mount? Going on suspicion - without any discernible qualifications to back me up - I will guess the problem is in the lens mounts. That there is a population of lenses with wildly varying build standards and wear variables (well, widely varying within a small range but varying nonetheless) seems to me to be a more logical conclusion than a bunch of brand new M8 bodies that are far enough out of specification to cause this problem. It seems illogical to require matching of a body to a set of lenses, since the acquisition of additional bodies would seem to render the initial matching exercise no longer valid. Surely you shouldn't have to send in all your lenses and all your bodies each time you buy a new body! Of course I have been often wrong before and stand ready to be wrong once again. Will we ever know the correct answer? --Bob I am happy (unhappy) its the bodys in my case. All my lens are new and I have one body (albeit electronically faulty) that focuses properly with them all. The faulty bodys are back focusing with all the lenses. Link to post Share on other sites More sharing options...
rbaron Posted June 25, 2007 Share #47 Posted June 25, 2007 Advertisement (gone after registration) By "new" do you mean six bit coded? Link to post Share on other sites More sharing options...
billh Posted June 25, 2007 Share #48 Posted June 25, 2007 Hi Bob, That seems logical, but then we hear about situations like Graham experienced, where only one of five M8s is focusing correctly - these lenses all focused OK on this camera, and it seems doubtful all of the lenses would be off the same amount, thus focusing accurately on a lone M8 which was out of adjustment. Also, I know people who have gone through three M8s, and finally received one that focused correctly. And, these lenses focused accurately on the film cameras...hence your chicken or egg analogy. I do think we will know what the problem is because so many of us are experiencing this issue, and sooner or later the reason(s) will be known (or rectified, so it no longer catches our attention). I can’t imagine the dealers are quietly accepting of this situation. Bill Link to post Share on other sites More sharing options...
sean_reid Posted June 25, 2007 Share #49 Posted June 25, 2007 Possible, but unusual. Sean, is there anyone you can talk with at Leica who will tell you what is going on with this back focus problem? How, and when is the rangefinder calibrated (or is it)? Are there ten people doing this, and one of them gets it right, while the others...? There must be some explanation for this hit or miss calibration problem. Clearly some work, but many others are off, and it always seems they back focus. Thanks, Bill Hi Bill, Well, as you know, I end up testing a lot of lenses very carefully. And the 35s review, for example, includes the new focus shift tests. Yes, I will discuss this with Leica and see what I can find out. Do you want to do a survey here to find out what percentage (of the respondents) are experiencing problems with focus (of a variety of lenses)? That would be good info. to have before I approach Leica. Cheers, Sean Link to post Share on other sites More sharing options...
sean_reid Posted June 25, 2007 Share #50 Posted June 25, 2007 I am a believer, really, honest I am.............. OK...and I believe that you believe. <G> Link to post Share on other sites More sharing options...
billh Posted June 25, 2007 Share #51 Posted June 25, 2007 Hi Sean, I am not sure how you do a survey here, but it would be interesting to know how many people are having problems. It does seem quite prevalent. I can’t imaging that Leica does not have a very good feel for the magnitude of the problem. By the way, the shift lens test was very interesting. There seem to be quite a few of us who use the Canon SLRs. What’s next? Bill Link to post Share on other sites More sharing options...
London Lad Posted June 25, 2007 Author Share #52 Posted June 25, 2007 By "new" do you mean six bit coded? I actually meant new as in I purchased them new in February when I purchased the camera. They are also all 6 bit coded. I do also have CV 40mm and 15mm lenses but I have not really mentioned them as they are not Leica lenses and the 40 was second hand. (Just for info the 40 back focuses on the faulty bodys just the same as the Leica lenses and the 15mm is imposable to test due to its DOF) Link to post Share on other sites More sharing options...
rbaron Posted June 25, 2007 Share #53 Posted June 25, 2007 I actually meant new as in I purchased them new in February when I purchased the camera. They are also all 6 bit coded. I do also have CV 40mm and 15mm lenses but I have not really mentioned them as they are not Leica lenses and the 40 was second hand. (Just for info the 40 back focuses on the faulty bodys just the same as the Leica lenses and the 15mm is imposable to test due to its DOF) Well, there are some more data points for the investigators. Now, how do we explain that some but not all of my lenses backfocus? Poltergeists? <vbg> I swear, this is making my head hurt. --Bob Link to post Share on other sites More sharing options...
London Lad Posted June 25, 2007 Author Share #54 Posted June 25, 2007 Well, there are some more data points for the investigators. Now, how do we explain that some but not all of my lenses back focus? Poltergeists? <vbg> I swear, this is making my head hurt. --Bob I assume there are a number of problems out there, badly calibrated cameras, badly calibrated lenses and focus shift on some lenses. This thread was really about faulty new cameras as there are other threads covering lenses and focus shift but of course all info is welcome. Link to post Share on other sites More sharing options...
rbaron Posted June 25, 2007 Share #55 Posted June 25, 2007 I assume there are a number of problems out there, badly calibrated cameras, badly calibrated lenses and focus shift on some lenses. This thread was really about faulty new cameras as there are other threads covering lenses and focus shift but of course all info is welcome. Sorry, didn't mean to hijack or divert the thread, but I saw the backfocus issue as potentially (likely?) a faulty camera issue. In any event I've put in my 2 cents worth and will wait to see what results, but if in the meantime I learn anything of value I'll certainly chime back in. --Bob Link to post Share on other sites More sharing options...
London Lad Posted June 25, 2007 Author Share #56 Posted June 25, 2007 Sorry, didn't mean to hijack or divert the thread, but I saw the backfocus issue as potentially (likely?) a faulty camera issue. In any event I've put in my 2 cents worth and will wait to see what results, but if in the meantime I learn anything of value I'll certainly chime back in. --Bob Sorry Bob, my post came out wrong, I didn't mean to infer a hijack or sound rude. Link to post Share on other sites More sharing options...
wlaidlaw Posted June 25, 2007 Share #57 Posted June 25, 2007 I think my camera is OK as it seems fine on Biogons 21 and 35, Elmar 50 and Elmarit 90. My Noctilux was so far off (after service and coding) and in such a weird way (out by nearly 2 M in the mid range but OK at infinity and only slightly out at near range), that I did question if my M8 was off just in the mid-range. However the Nocti behaved equally badly on two other new M8 bodies, which reassured me that it was the lens. Apparently my Nocitlux will be finished its re-repair this week and on its way back to me, so we shall see how good it is now. Wilson Link to post Share on other sites More sharing options...
sean_reid Posted June 26, 2007 Share #58 Posted June 26, 2007 Hi Sean, I am not sure how you do a survey here, but it would be interesting to know how many people are having problems. It does seem quite prevalent. I can’t imaging that Leica does not have a very good feel for the magnitude of the problem. By the way, the shift lens test was very interesting. There seem to be quite a few of us who use the Canon SLRs. What’s next? Bill Hi Bill, I would imagine that Leica doesn't have much a sense of how many cameras have misadjusted rangefinders unless its a large number (in the general population of M8 owners). Thanks for the comment on the shift lenses test. Next is the 35 mm RF lens review and an article about photography tutorials (with Ben Lifson). The 85/90s also coming up this summer as well as the D-P1, the K10D, Zeiss lenses for Nikon, photographing people one knows and the ideas keep rolling. Cheers, Sean Link to post Share on other sites More sharing options...
Guest Lotw Posted June 26, 2007 Share #59 Posted June 26, 2007 I would say if it is back- or frontfocusing on a Visoflex it's definitely the body. Link to post Share on other sites More sharing options...
rbaron Posted June 26, 2007 Share #60 Posted June 26, 2007 I would imagine that Leica doesn't have much a sense of how many cameras have misadjusted rangefinders unless its a large number (in the general population of M8 owners). I would be more than happy to help them get a sense. --Bob Link to post Share on other sites More sharing options...
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