macusque Posted January 2, 2007 Share #1 Posted January 2, 2007 Advertisement (gone after registration) I have a problem with my DMR, it seems like the sensor is slightly "rotated" counterclockwise (clockwise if you look at it through the lens or opening the back). Not that I could see it with the naked eye, but when I align the framelines correctly I end up with a slightly rotated image. I need to rotate it about 0,5° CCW in PS to have it correctly aligned. It doesn't seem to be a screen issue, as the DMR screen's framelines are perfectly aligned with the screen borders. Indeed if I align the image using the borders of the whole viewfinder I get again a slightly rotated image. Anyone went into this issue ? Quote Link to post Share on other sites More sharing options...
Advertisement Posted January 2, 2007 Posted January 2, 2007 Hi macusque, Take a look here DMR alignment issue. I'm sure you'll find what you were looking for!
macusque Posted January 2, 2007 Author Share #2 Posted January 2, 2007 Any insight ? Quote Link to post Share on other sites More sharing options...
andybarton Posted January 2, 2007 Share #3 Posted January 2, 2007 I find that I have to correct horizons when using my R8/DMR pretty regularly. But then again, I have to when using my M2, too. The chances of the sensor being out of alignment on the back must be infinitessimally small. It's a precision instrument. I would think that it's more likely that the action of taking the shot is moving the body very slightly down on the right, needing the adjustment. Have you tested using a tripod and remote release or self timer? Quote Link to post Share on other sites More sharing options...
robert_parker Posted January 2, 2007 Share #4 Posted January 2, 2007 Marco I agree with Andy - unless by some mis-chance the DMR back is slightly loose, it's more likely to be wth weight of the camera in the hands that is causing the problem - with the crop factor, even a slight tilt will show up markedly on the negative. I've observed a slight dip of the horizon to the right in the past (camera slipping left) which I've put down to the weight on the hand strap. Quote Link to post Share on other sites More sharing options...
jlancasterd Posted January 2, 2007 Share #5 Posted January 2, 2007 If you can ensure that every shot you take hand held is absolutely level to within half a degree you're a better photographer than I am! :D Have you checked using a spirit level with the camera on a tripod? Quote Link to post Share on other sites More sharing options...
Julian H Posted January 2, 2007 Share #6 Posted January 2, 2007 Marco I'd double check your focussing screen. My original one was out (only at the bottom) and my dealer replaced it. Julian Quote Link to post Share on other sites More sharing options...
bnelsch Posted January 2, 2007 Share #7 Posted January 2, 2007 Advertisement (gone after registration) I thought it was just me but I was too embarrassed to bring it up. Quote Link to post Share on other sites More sharing options...
robsteve Posted January 2, 2007 Share #8 Posted January 2, 2007 The alignment is probably related to the door latch on the R9 or R8. In the days of film, it didn't matter if the pressure plate was tilted half a degree one way or another. Try opening the door latch and closing it again and see if your alignment changes. Quote Link to post Share on other sites More sharing options...
macusque Posted January 2, 2007 Author Share #9 Posted January 2, 2007 Robert is right I opened the back to clean the sensor and now the alignment is perfect! I recall I once mistakenly tried to open the back before detaching the motor and grip, maybe ending with a slightly move of the door latch, which caused the misalignment. Thank you all for answering, this forum is great! Anyway I NEVER found an easier digital camera to clean. Just open the back and gently wipe off the dust with a dedicated sensors' cleaning product. I use Arctic Butterfly from Visible Dust, which is fast and very effective. After only a couple of wipes I couldn't detect any dust spot even at 100% on monitor using levels to increase contrast... Quote Link to post Share on other sites More sharing options...
robsteve Posted January 2, 2007 Share #10 Posted January 2, 2007 BTW, as Leica suggested, you can use a slide Loupe to look at the sensor and see the dust without even shooting a picture. I usually do that before doing the test shots. In bright light and a 6x loupe, even the smallest dust is obvious. Quote Link to post Share on other sites More sharing options...
Freggio Posted August 17, 2012 Share #11 Posted August 17, 2012 Sorry to wake up this 5 year old thread. But I have a similar issue I'd appreciate some advice on. I've been using my R8 with DMR regularly for the past few years and even though I've learned to adapt I've always wondered why the crop lines on the focussing screen are too low and don't accurately show the crop of the sensor. I've tested this many times using various lenses with the R8 properly secured on a tripod and I always get the same result. The crop marks are slightly smaller than captured image (which is fine) and about 5% to 10% too low. This means that a small part at the bottom of the framed image gets cut off. This issue is constant and has never changed as long as I've been using the gear. I've tried removing and replacing both the DMR back and the focussing screen with no improvement and I can see no mechanical faults in either. And so far there have been no other issues with it. (Touch wood). The odd thing is, although I've tried to find information on this on the internet every couple of months for the past 2 years or so I've never found a single reference to this issue. This post is the nearest I've come across. I've mocked-up and attached a rough image showing the kind of alignment issue I'm experiencing. Have any past or present DMR users experienced a similar issue? Many thanks, Freggio Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/12577-dmr-alignment-issue/?do=findComment&comment=2088559'>More sharing options...
topoxforddoc Posted August 18, 2012 Share #12 Posted August 18, 2012 Do you have only 1 DMR screen? If you have some others, you could try another screen to see if it the screen. To be honest I have only ever used the crop marks as a guide (bit like the frame lines on a M camera). Charlie Quote Link to post Share on other sites More sharing options...
andybarton Posted August 18, 2012 Share #13 Posted August 18, 2012 If you cannot find another screen and the cropping is 100% consistent, then just adjust your framing accordingly. I don't recall my DMR doing this but it's a long time sold. Quote Link to post Share on other sites More sharing options...
jaapv Posted August 18, 2012 Share #14 Posted August 18, 2012 I had a similar problem a while ago. It turned out that the Brightscreen viewfinder magnifier I use is too long at the bottom, forcing me to look into the viewfinder at an angle. Grinding it down solved the problem. So: could it be that you are looking through the viewfinder at a slight habitual angle to the optical axis? Quote Link to post Share on other sites More sharing options...
guidowi Posted August 19, 2012 Share #15 Posted August 19, 2012 I have this problem normally with DMR on the R9. If i frame in the screen framelines as in the first picture i get on the sensor as the second one: I loose something at the bottom and there is something unwanted at the top. This doesn't happen if I mount DMR and DMR screen on a R8. I anyway find the problem also on film and heard about other people with this issue that I presume is a R9 issue; something wrong in the screen alignment or in the film window cutting. This is not exactly what could be expected from this kind of camera. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/12577-dmr-alignment-issue/?do=findComment&comment=2089723'>More sharing options...
Wolfgang Esslinger Posted August 19, 2012 Share #16 Posted August 19, 2012 M users wish they had problems like this one It is not perfect but which Leica is? And it is only a potential issue with slide film. Quote Link to post Share on other sites More sharing options...
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