chrisgad Posted November 3, 2011 Share #1 Posted November 3, 2011 Advertisement (gone after registration) I bought a lovely old 35mm Summicron from Red Dot Cameras in London - very friendly and helpful - and ordered a hood and UV filter separately. The hood fitted perfectly, but the filter was not the best of fits, so I dotted a couple of drops of superglue between the hood and filter. Perfect! Except that two days later, when I went to use the lens, the front element had turned white. I Googled the problem, and found that superglue fumes wreck lens coatings. Fortunately, we are covered for accidental damage, and our insurers will pay out, but it's a sad story. 1 Link to post Share on other sites More sharing options...
Advertisement Posted November 3, 2011 Posted November 3, 2011 Hi chrisgad, Take a look here Danger! Superglue fumes and lens coatings. I'm sure you'll find what you were looking for!
plasticman Posted November 3, 2011 Share #2 Posted November 3, 2011 Maybe this thread could be moved to the customer forum instead as it's of interest to all Leica lens owners. And thanks for the information. Link to post Share on other sites More sharing options...
wda Posted November 3, 2011 Share #3 Posted November 3, 2011 chrisgad, welcome to the forum! What a disturbing event! I had not heard of this risk before. Just wondering why you needed to cement the filter to the lens hood? Wouldn't that make removal of the hood impossible? Link to post Share on other sites More sharing options...
250swb Posted November 3, 2011 Share #4 Posted November 3, 2011 There are more than one type of superglue, and this is why you can buy non-fogging superglue, a better choice for camera repairs. Steve Link to post Share on other sites More sharing options...
Studio58 Posted November 3, 2011 Share #5 Posted November 3, 2011 note to self. Avoid using damaging noxious substances within the vicinity of expensive equipment...... yep, reckon I can instill this in the grey matter Link to post Share on other sites More sharing options...
chrisgad Posted November 3, 2011 Author Share #6 Posted November 3, 2011 chrisgad, welcome to the forum!What a disturbing event! I had not heard of this risk before. Just wondering why you needed to cement the filter to the lens hood? Wouldn't that make removal of the hood impossible? No, the hood still came off the lens, and I thought I would not (often, at least) want to remove the filter from the hood. On the old Summicrons, you can't screw a filter in to the lens, so you have to use a hood to hold a filter. 1 Link to post Share on other sites More sharing options...
ho_co Posted November 3, 2011 Share #7 Posted November 3, 2011 (edited) Advertisement (gone after registration) Is it the 12504 lens hood? Doesn't that unscrew to hold a Series VII filter inside the hood? Thanks for the information on the glue! Good to know! Sorry you had to find out the hard way. Edited November 3, 2011 by ho_co Link to post Share on other sites More sharing options...
gyoung Posted November 3, 2011 Share #8 Posted November 3, 2011 Well known I thought, also affects paints and glass, not just coatings Gerry 2 Link to post Share on other sites More sharing options...
pico Posted November 3, 2011 Share #9 Posted November 3, 2011 Well known I thought, also affects paints and glass, not just coatingsGerry Cyanoacrylate is amazing stuff, but I see no applications for cameras that safer adhesives cannot perform. One more thing to never get near a camera is powdered graphite ("dry lube"), such as found in small tubes to applied to locks, and so-forth. The particles are so small they invade anything nearby and can be carried deep into the works of a lens, for example, and ruin it. Link to post Share on other sites More sharing options...
lct Posted November 3, 2011 Share #10 Posted November 3, 2011 Is it the 12504 lens hood? Doesn't that unscrew to hold a Series VII filter inside the hood?... Yes indeed. I don't understand what the OP did exactly. Link to post Share on other sites More sharing options...
Jeff S Posted November 3, 2011 Share #11 Posted November 3, 2011 Leica lenses are addictive enough without breathing glue fumes while in use. Jeff Link to post Share on other sites More sharing options...
Shade Posted November 3, 2011 Share #12 Posted November 3, 2011 Wow Thanks for sharing and sorry to hear what happened. Any pictures of the lens after the glue fumes? Link to post Share on other sites More sharing options...
pico Posted November 3, 2011 Share #13 Posted November 3, 2011 Is it the 12504 lens hood? Doesn't that unscrew to hold a Series VII filter inside the hood? That's the hood for the pre-ASPH 35mm Summilux, allright. However, there is/was a Chinese clone of it (cheap) that was defective in that one of the tabs that held the unit to the lens did not extend fully, making the thing unstable, loose. Perhaps he has that one and the Super Glue just tacked the shade's base on. (If you get one of those Chinese clones, just identify the offending tab and use Dremel's thinnest cutting wheel to make its slot a tiny bit longer.) Link to post Share on other sites More sharing options...
andybarton Posted November 3, 2011 Share #14 Posted November 3, 2011 OT, but the 12504 hood works very well on my 35 Summicron ASPH too. 1 Link to post Share on other sites More sharing options...
lct Posted November 3, 2011 Share #15 Posted November 3, 2011 Sure but it is not as effective as the square plastic one i suspect. Other problem is for M8 users to find out a Series VII IR-cut filter. Link to post Share on other sites More sharing options...
wattsy Posted November 3, 2011 Share #16 Posted November 3, 2011 Fortunately, we are covered for accidental damage, and our insurers will pay out Are you having the lens recoated or are the insurers paying to have it replaced? If the latter, seems like a sad end for such a fine lens. Is it an expensive process? Link to post Share on other sites More sharing options...
chrisgad Posted November 3, 2011 Author Share #17 Posted November 3, 2011 Are you having the lens recoated or are the insurers paying to have it replaced? If the latter, seems like a sad end for such a fine lens. Is it an expensive process? I am going to find out if the lens can be repaired, and if so whether the repair cost would be lower than the resale value of the lens. It would be the insurers' decision in the end, since they would be entitled to any gain. Link to post Share on other sites More sharing options...
SJP Posted November 4, 2011 Share #18 Posted November 4, 2011 I would be most surprised if the marks cannot be removed, and I would be happy to use superglue on a lens if necessary. Having said in this case locktite or general purpose adhesive makes more sense to me. You get similar white marks with other superglue applications, esp. if the amount us is rather large. One or 2 very small drops would be enough in normal situations. I think I used some superglue when glueing the lens mounting dot on my 28/2 asph (no problem, no white residue, after quickly removing any surplus). Link to post Share on other sites More sharing options...
pico Posted November 5, 2011 Share #19 Posted November 5, 2011 I would be most surprised if the marks cannot be removed, and I would be happy to use superglue on a lens if necessary. Having said in this case locktite or general purpose adhesive makes more sense to me. You get similar white marks with other superglue applications, esp. if the amount us is rather large. One or 2 very small drops would be enough in normal situations. I CRINGE when I hear general remarks regarding Locktite. Look at all their products and you might find that their 'cylinder lock' might be more appropriate. Look, I've been using their stuff since it was invented. Be careful with all this stuff, but especially products other than Locktite which are aromatic and death to optics. Link to post Share on other sites More sharing options...
normclarke Posted November 5, 2011 Share #20 Posted November 5, 2011 I had a similar experience a few years ago with a Nikkor-O 2.1cm. I constructed a rear cap using an old film canister, glueing it to a modified Nikon rear cap and foolishly left it on the lens. On removal it was plain to see the problem, it had coated the rear element. I managed to remove the bloom with re-agent grade IPA without damage to the coating. Say's something about the durability of Nikon lens coatings. Best, normclarke. Link to post Share on other sites More sharing options...
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