eudemian Posted November 9, 2007 Share #1 Posted November 9, 2007 Advertisement (gone after registration) When in need it is always wise to consult the group so please any advice on this problem would be appreciated. I have just purchased a 75 Summilux, it is new stock. Everything seems fine but there is only what I can describe as slop on the main barrel when the lens is mounted. If you can imagine that the distance setting will move slightly in relation to the engraved depth of field focal setting (hope I describe that correctly) The lens seems to take great photo's but I do find this slight movement in the main barrel of the lens disconcerting. So, is this a characteristic of this lens (none of my other lens do this) or should I try to get it remedied? What could cause such movement in the barrel of the lens without affecting the focus. The focusing action is wonderfully smooth, probably amongst the best of all my lens. Incidentally, I had forgotten about the ir contamination but of course I do not have an ir filter for this yet and wondered why my blacks looked suddenly looked wacky, it is amazing how soon we forget. Tom Link to post Share on other sites More sharing options...
Advertisement Posted November 9, 2007 Posted November 9, 2007 Hi eudemian, Take a look here 75 Summilux slop?. I'm sure you'll find what you were looking for!
wparsonsgisnet Posted November 9, 2007 Share #2 Posted November 9, 2007 Tom, when I use this lens or the 90 'cron I am in the habit of twisting the focus ring until the image snaps into focus and then stopping. That is, I move the ring so the focus is off and then twist slowly until the images exactly superimpose. I tend to do this will the wider lenses as well, tho it probably doesn't make any difference with them. Link to post Share on other sites More sharing options...
Daniel Ortego Posted November 9, 2007 Share #3 Posted November 9, 2007 Tom, when I use this lens or the 90 'cron I am in the habit of twisting the focus ring until the image snaps into focus and then stopping. That is, I move the ring so the focus is off and then twist slowly until the images exactly superimpose. I tend to do this will the wider lenses as well, tho it probably doesn't make any difference with them. That is definitely an “old school” rangefinder technique, and one that I, also still embrace. How this may apply to the gearing in the lens is likely based on the same principle of reducing backlash (slop). Regards, Link to post Share on other sites More sharing options...
wparsonsgisnet Posted November 9, 2007 Share #4 Posted November 9, 2007 I am, however, a very young practitioner of the old school! Thanks for the backup, Daniel. Thomas, I have used the 75, 90, and 135 lenses and find that they are all "slow focusers." As they get longer, they become more difficult to focus. I recommend the 1.25 magnifier. This is a now-required addition to my kit. It never comes of the camera, even with the CV15 mounted. When in an environment where fast response is required, these lenses are hard to use -- unless there is enuf light to close them down and zone focus. When you have the time to focus carefully, the images are wonderful. Link to post Share on other sites More sharing options...
eudemian Posted November 9, 2007 Author Share #5 Posted November 9, 2007 Thanks for your replies but I do not think have not described the problem clearly or accurately enough. Bear with me while I try to clarify. I do not have problem with focus, in fact the focusing action is superb. The problem? or unusual characteristic is that the lens barrel will move in relation to the mount. i.e. if I align the infinity mark on the distancefocus element of the lens with the 1.4 engraving on the hyperfocal markings of the lens I can move the whole barrel of the lens in relation to that 1.4 mark even when the focus ring is held tight. Does that help in explaining the problem? Hope so. I only got the lens this afternoon so it is early days. Tom Link to post Share on other sites More sharing options...
wparsonsgisnet Posted November 9, 2007 Share #6 Posted November 9, 2007 Tom, is the entire lens moving at the point where it fastens to the body, or is the part of the lens beyond the focus knob moving? This doesn't sound like it would make ones heart glad. Link to post Share on other sites More sharing options...
eudemian Posted November 9, 2007 Author Share #7 Posted November 9, 2007 Advertisement (gone after registration) Hi Bill, It is the part beyond the focus knob that moves, the bayonet part is rock solid. Does that help? Link to post Share on other sites More sharing options...
woodyspedden Posted November 9, 2007 Share #8 Posted November 9, 2007 Tom I am sitting here at my desk with my M8 and 75 Lux. There is zero "slop" anywhere on the lens when focusing. The barrel stays solid and the moving part of the lens moves in and out very precisely and straight backwards and forwards. No rotational movement that I can see. Hope this helps Woody Spedden Link to post Share on other sites More sharing options...
LichMD Posted November 10, 2007 Share #9 Posted November 10, 2007 Same here, rock solid lens mount, body and hood. Link to post Share on other sites More sharing options...
ho_co Posted November 10, 2007 Share #10 Posted November 10, 2007 Same here. No looseness anywhere. It should feel and handle like your other Leica lenses. My recommendation is to send it to Leica for adjustment under warranty. --HC Link to post Share on other sites More sharing options...
marknorton Posted November 10, 2007 Share #11 Posted November 10, 2007 I agree, sounds like the helicoid is loose in the rear lens barrel, needs to be looked at. Link to post Share on other sites More sharing options...
eudemian Posted November 10, 2007 Author Share #12 Posted November 10, 2007 Thank you for the input, it looks like I will send it to Leica for repair under warranty. Tom Link to post Share on other sites More sharing options...
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