michaelwj Posted November 17, 2015 Share #1 Posted November 17, 2015 Advertisement (gone after registration) First thread in the "Collectors and Historica" section - I never considered myself a collector, or a historic buff, but then how long can you keep away! This is one of my favourite places to lurk. Back to my query, I recently picked up a pair of Leitz filters for a 21/3.4/SA (lens is one the way) - A POOBV orange and a POOGL red in 48mm with TELYT 200 on the rim. Both are in great condition, except the glass in the POOBV is a bit loose - I can move it with my fingers, and feel and hear it move if I shake the filter (dependent on the orientation of my shake and where I hold it. It doesn't feel like it is going to come out, but it's a bit disconcerting none the less. Does anyone have any thoughts on how to secure it better? I can't see a retaining ring anywhere. Glue? If so I assume a tiny bit, but what type and where? Front or back? Any help would be appreciated. Cheers, Michael p.s. I love the 5 letter codes, so wacky! Quote Link to post Share on other sites More sharing options...
Advertisement Posted November 17, 2015 Posted November 17, 2015 Hi michaelwj, Take a look here Loose Glass in POOBV - fix?. I'm sure you'll find what you were looking for!
jc_braconi Posted November 18, 2015 Share #2 Posted November 18, 2015 The filter glass is assured by a threaded ring in the back or in the front side depending of the diameter and year of issue using a magnificent lens you will see 2 tiny slots in this ring not so easy to see because this ring is black usualy so using a blade of a right width inserted in the 2 slots you can screw it clockwise side until your glass is fixed good luck 1 Quote Link to post Share on other sites More sharing options...
Michael Geschlecht Posted November 18, 2015 Share #3 Posted November 18, 2015 Hello Michael, Also: Don't make the ring too tight. Just a little bit beyond "snug" should be fine. Best Regards, Michael Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 19, 2015 Author Share #4 Posted November 19, 2015 (edited) Thank you for the information. I checked now that I am home, and I can't see a ring anywhere. It also turns out that this is not a POOBV, but a POOKZ, the same as this one: http://www.ebay.co.uk/itm/LEICA-LEITZ-POOKZ-13310-LEICA-E48-48MM-ORANGE-FILTER-LEICA-9CM-THAMBAR-TELYT-/221919621112 It would have to be very small for me to miss it, and I have a red one, POOGL, which apart from being red is identical. It has no loose glass and I can't see a retaining ring on it either. Cheers, Michael Edited November 19, 2015 by michaelwj Quote Link to post Share on other sites More sharing options...
jc_braconi Posted November 19, 2015 Share #5 Posted November 19, 2015 http://www.ebay.co.u...T-/221919621112 ? out of reach Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 19, 2015 Author Share #6 Posted November 19, 2015 Hi jc, Looks like that ones gone now, maybe we advertised it too well! I paid only US$20, 1/5th of the shipped price of that one, and apart from the wobble... I might place a small drop of epoxy glue on the rim to secure it. But if there's another way without 'altering' it, I'd prefer that of course. Not sure there is though. Cheers, Michael Quote Link to post Share on other sites More sharing options...
jc_braconi Posted November 20, 2015 Share #7 Posted November 20, 2015 Advertisement (gone after registration) Please post a pict of both sides Quote Link to post Share on other sites More sharing options...
Michael Geschlecht Posted November 20, 2015 Share #8 Posted November 20, 2015 Hello Michael, "A drop of epoxy" might not be the best solution. Generally, it is better to repair things in an easily reversible manner. Best Regards, Michael Quote Link to post Share on other sites More sharing options...
pico Posted November 20, 2015 Share #9 Posted November 20, 2015 Just how loose is it? If only a little, then leaving it be might suffice. Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 20, 2015 Author Share #10 Posted November 20, 2015 Hi Pico, Yes, it's only a little loose. More annoying than anything else. Michael, I would prefer to repair it 'non-destructively' of course. jc, I'll post some picts later today. Cheers, Michael Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 21, 2015 Author Share #11 Posted November 21, 2015 Front and back attached. I can't see anything that screws in. Cheers, Michael 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/253249-loose-glass-in-poobv-fix/?do=findComment&comment=2933440'>More sharing options...
gbealnz Posted November 21, 2015 Share #12 Posted November 21, 2015 I agree with the ability to undo the fix, if needed, epoxy won't allow that I fear. A small drop of nail polish, or a small blob (and I mean SMALL) of silicon would be what I used, if at all. Gary Quote Link to post Share on other sites More sharing options...
jc_braconi Posted November 21, 2015 Share #13 Posted November 21, 2015 Something must retaining this glass so I suppose there is a ring like clip in the side where the diameter of the glas is narrow than the other so carefully pushing this ring all around with a wooden stick (like a chinese stick) you wil resolve the problem good luck Quote Link to post Share on other sites More sharing options...
Michael Geschlecht Posted November 21, 2015 Share #14 Posted November 21, 2015 (edited) Hello Again Brian, Some filters are put in their mounts purposefully a little loosely to provide for dissimilar expansion/contraction rates between the glass & the metal frame. Does this filter glass rattle a lot or just a small amount? Best Regards, Michael Edited November 21, 2015 by Michael Geschlecht Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 23, 2015 Author Share #15 Posted November 23, 2015 Something must retaining this glass so I suppose there is a ring like clip in the side where the diameter of the glas is narrow than the other so carefully pushing this ring all around with a wooden stick (like a chinese stick) you wil resolve the problem good luck This has me flummoxed! I can't see anything! It's like the glass is magically held there, I've been around it many times and can't for the life of me find anything that looks (or feels - with a wooden skewer) remotely like able to be tightened. Some filters are put in their mounts purposefully a little loosely to provide for dissimilar expansion/contraction rates between the glass & the metal frame. Does this filter glass rattle a lot or just a small amount? Best Regards, Michael It is a small amount, but more than I'd expect to account for thermal effects. I don't think that it will fall out, so I might just leave it until I can work out how it is secured and how/if it can be tightened. Cheers, Michael Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 23, 2015 Author Share #16 Posted November 23, 2015 I agree with the ability to undo the fix, if needed, epoxy won't allow that I fear. A small drop of nail polish, or a small blob (and I mean SMALL) of silicon would be what I used, if at all. Gary I'd prefer not to use nail polish - it's horrible stuff, but I was thinking a small dot of Plasticine or silicon would stop the rattle, and be able to be removed easily Cheers, Michael Quote Link to post Share on other sites More sharing options...
pico Posted November 23, 2015 Share #17 Posted November 23, 2015 This fussing is unnecessary. As-is the filter is probably just fine. If you wish, take a bit of lint and push it under the he side-edge of the filter with something like a dental pick (aka dental explorer). Solved! Quote Link to post Share on other sites More sharing options...
michaelwj Posted November 23, 2015 Author Share #18 Posted November 23, 2015 This fussing is unnecessary. As-is the filter is probably just fine. If you wish, take a bit of lint and push it under the he side-edge of the filter with something like a dental pick (aka dental explorer). Solved! Most definitely unnecessary pico! But it would be nice if there was a 'clean' way of returning it to perfection! Cheers, Michael Quote Link to post Share on other sites More sharing options...
masjah Posted November 23, 2015 Share #19 Posted November 23, 2015 The contemporry Leica filters do indeed seem to be compliantly mounted with some sort of ring spring bearing the glass against the metal holder. You can tell this by pushing the glass gently from the outer side - it will give slightly against a spring tension. So, in this case, is the "looseness" a movement parallel or perpendicular to the glass element? Quote Link to post Share on other sites More sharing options...
pico Posted November 23, 2015 Share #20 Posted November 23, 2015 The contemporry Leica filters do indeed seem to be compliantly mounted with some sort of ring spring bearing the glass against the metal holder. You can tell this by pushing the glass gently from the outer side - it will give slightly against a spring tension. So, in this case, is the "looseness" a movement parallel or perpendicular to the glass element? Perhaps the design is to be compliant in varying temperatures. In very large lenses such as some aerial photo lenses, the filter is sprung. Some are heated as well. In my humble mucking about to make a filter fit properly on an early Zeiss 38mm Biogon (so that the filter did not touch the top center of the lens) I used very fine nylon fishing line in the rim. It worked so well it has been in place and used for over twenty years. And yes, it feels 'loose' if you push upon it, but it does not turn so that the movement is perpendicular. 1 Quote Link to post Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.