Eoin Posted January 30, 2007 Share #1 Â Posted January 30, 2007 Advertisement (gone after registration) I'm looking for a bit of advice, if any one can help. I seem to recall that before my M8 went back to Solms for the upgrade when I focused on an object at say infinity distance, the the lens would focus the rangefinder and still have a tiny bit of movement(1-2mm) before hitting the infinity focus stop on the lens. What I mean by this is the split image in the viewfinder would come together and then very slightly go past if the lens was focused all the way to the infinity stop. I now notice that I have to turn the focus ring all the way to the infinity lens stop to get the RF to align and on 1 lens 21mm the alignment is just a fraction shy of perfect overlap at the infinity stop on the lens. Â In your experience is there any movement left on the focus ring when you focus on an object at infinity distance?. Or is my memory just starting to fail me and this is an early warning of the onset of alzheimers?. Â TIA for your help. Link to post Share on other sites More sharing options...
carstenw Posted January 30, 2007 Share #2 Â Posted January 30, 2007 In my experience there isn't any slop left. It stops right at infinity. It may be that the 21mm lens needs a tiny bit of adjustment there. Having said that, infinity focus was off on my M8, and fixing that myself to perfection doesn't seem to have fully cured the near-focus. I only seem to have problems with my 50 Lux Asph, whereas my 35 Cron Asph works fine, so I am not quite sure what to think now, given that the 50 just returned from Solms. Â My feeling is that Leica is so over-worked at the moment that some things are slipping through which normally would not slip through. Whatever my current problems, I am going to wait until the M8 updates and lens codings all have been processed, and the people there are getting a good night's sleep again before sending anything else in. Link to post Share on other sites More sharing options...
EricC Posted January 30, 2007 Share #3 Â Posted January 30, 2007 I have just checked mine with my 24 asph, closest i have to the 21 you used, and yes at infinity focus it is at the stop. No movement left at all. Link to post Share on other sites More sharing options...
Eoin Posted January 30, 2007 Author Share #4 Â Posted January 30, 2007 Thanks Carsten and Eric, I could have sworn there was a tiny bit of turn left on the lenses before the trip to solms, but your experience is the same as I have now so I guess it's time to make an appointment for the Alzheimer clinic. Â Thanks again Link to post Share on other sites More sharing options...
carstenw Posted January 30, 2007 Share #5 Â Posted January 30, 2007 After an M8 gets updated, they do send it to Q&A for a checkup, so it it entirely possible that they adjusted it a little. I would hold off on the clinic and order another Murphy's. I'd even buy a round if I were close enough Link to post Share on other sites More sharing options...
Eoin Posted January 30, 2007 Author Share #6  Posted January 30, 2007 Murphy's?, you were obviously down southeast in Ireland (Cork direction). I'm a true blue Dublin born and bread, as such I support St James's gate (Guinness) when tippling the "Black Stuff". Tequila straight up is my drink at the moment, now you know why M8's are not left on the table in my local  Cheers sorry what did you say your name was? Link to post Share on other sites More sharing options...
jaapv Posted January 30, 2007 Share #7 Â Posted January 30, 2007 Advertisement (gone after registration) I'm looking for a bit of advice, if any one can help.I seem to recall that before my M8 went back to Solms for the upgrade when I focused on an object at say infinity distance, the the lens would focus the rangefinder and still have a tiny bit of movement(1-2mm) before hitting the infinity focus stop on the lens. What I mean by this is the split image in the viewfinder would come together and then very slightly go past if the lens was focused all the way to the infinity stop. I now notice that I have to turn the focus ring all the way to the infinity lens stop to get the RF to align and on 1 lens 21mm the alignment is just a fraction shy of perfect overlap at the infinity stop on the lens. Â In your experience is there any movement left on the focus ring when you focus on an object at infinity distance?. Or is my memory just starting to fail me and this is an early warning of the onset of alzheimers?. Â TIA for your help. Â It should stop exactly at infinity.However, I've been using Leica M camera's for nearly forty years now, and a considerable number of lens/body combinations over the years were not quite 100% in this respect. I've never let that bother me and I'm not starting now... Link to post Share on other sites More sharing options...
Nitnaros Posted January 30, 2007 Share #8 Â Posted January 30, 2007 It should stop exactly at infinity.However, I've been using Leica M camera's for nearly forty years now, and a considerable number of lens/body combinations over the years were not quite 100% in this respect. I've never let that bother me and I'm not starting now... Â I have gotten my M7 plus 35-lux back last summer from Leica New Jersey; the summilux at infinity still has this additional 1mm to go. Â Peter Link to post Share on other sites More sharing options...
tom0511 Posted January 30, 2007 Share #9 Â Posted January 30, 2007 I am not sure if it should stop at infinity. Isnt there a little tolerance for temperature compensation? Link to post Share on other sites More sharing options...
jaapv Posted January 30, 2007 Share #10 Â Posted January 30, 2007 On long focal lengths: certainly. On shortfocal lenghts the expansion would be well within tolerances. Link to post Share on other sites More sharing options...
billh Posted January 30, 2007 Share #11 Â Posted January 30, 2007 I have been having an issue with close focusing adjustments, so I tried the infinity setting too. I cannot find any consistent relationship between being on or off at infinity and on or off at close focus distances. Â I tried the close focusing test with and without the 1.25x - there was no difference - the 50ASPH, Noctilux, APO90 and APO135 are all back focusing at close distances. Changing the aperture does not matter (does not shift the plane of focus). The APO75 (and only this lens) seems to be focusing accurately at close distances. Â Infinity test. This one gets weird. When I set the lens barrel of the APO135, APO90 and APO75 at the infinity mark, they are focused correctly at infinity. When I focus these three lenses at far distances (infinity) using the rangefinder, the image is considerably out of focus. Â APO135, lens barrel set at infinity mark, Â APO135, focused at infinity with rangefinder, Â APO135, f3.4, back focused about 1.5 inches (38mm) at close distances, Â When I do this infinity test with the 50ASPH lens, it is correctly in focus regardless of whether I set the lens at infinity or focus at infinity with the rangefinder; However, this lens has the greatest back focus error of all the lenses at the close distances. If someone can tell me I should try to reset the infinity focus with the 2 mm allen wrench, (see instructions posted at, http://www.leica-camera-user.com/digital-forum/14684-back-focus-adjustment-question.html ) I may try that. I am hesitant to adjust the camera because i want to use the APO75 this weekend at close distances, and that is the one lens that is focusing correctly up close. Â Representative close and far images are here, the bottom three rows, Â http://homepage.mac.com/billh96007/Focus-test/PhotoAlbum205.html Link to post Share on other sites More sharing options...
jaapv Posted January 30, 2007 Share #12 Â Posted January 30, 2007 Close focus and infinity focus are two different things, only infinity is really user-adjustable. In your case I would put the 135 apo at infinity and take it from there. It is easily enough restored to its original position if need be. Link to post Share on other sites More sharing options...
billh Posted January 30, 2007 Share #13 Â Posted January 30, 2007 Jaap, Â It looks like both the lenses and the camera can be adjusted, so I have another test to do for the technician, and then hopefully I can get this resolved, even if it means sending every lens i own and the camera away. For me incorrect focus is the absolute worst issue. I have always used Ms up close and i focus on the eyes. When the plane of focus is somewhere other than the eyes, the picture is worthless to me. I went through this with at least one of the canons (1Ds, 1D2, 1Ds2), perhaps twice, and they fixed it so it focuses perfectly. Â Bill Link to post Share on other sites More sharing options...
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