Harpomatic Posted February 17, 2020 Share #1  Posted February 17, 2020 Advertisement (gone after registration) Hi, I have a B+W filter stuck to a Voigtlander Nokton 50mm 1.5 VM, the black version. I use these filters on all lenses and never tighten them hard, but the camera bag fell from the table when closed and the lens was mounted on my M240. There is a small deformation now on the filter ring, but just a little - apparently enough to sick the filter to the lens so hard I can’t shift it.  I tried by hand on grippy surface but I am afraid of ruining the lens itself, I wouldn’t want to unscrew/break the optical cell gripping the whole lens. I bought filter wrenches for the purpose, they are not bad but it doesn’t budge. I put the lens in the freezer for 10 minutes and tried agai, thinking that the shrinking with the low temp could work - no luck.  Any ideas?  Thanks! Link to post Share on other sites More sharing options...
Advertisement Posted February 17, 2020 Posted February 17, 2020 Hi Harpomatic, Take a look here Filter stuck - help!. I'm sure you'll find what you were looking for!
Reini Posted February 17, 2020 Share #2 Â Posted February 17, 2020 (edited) Either you let a professional do it ... or you're brave.I would use a mini-tool (diamond saw) to cut the filter ring in two places near the dent to the lens. You lose tension.Then you can use pliers to bend the piece in direction outside where the dent is and turn the filter out. I've successfully practiced something like this before. And very important !!! Pack the lens well so that no metal shavings get in. Edited February 17, 2020 by Reini 1 Link to post Share on other sites More sharing options...
Gelatino Posted February 17, 2020 Share #3 Â Posted February 17, 2020 Is the filter broken? If yes go for Reini advice after having taken the glass off (stick some gaffer or equiv. on it before braking it); If not let it . That's I would do. 1 Link to post Share on other sites More sharing options...
250swb Posted February 17, 2020 Share #4  Posted February 17, 2020 (edited) Your filter is now junk so don't try to save it, so with a hacksaw cut two notches in the rim of the filter 180 degrees apart and use a steel ruler or similar straight edge as a giant screwdriver placed across the notches. If you use the back edge of a kitchen knife, well that's your lookout. Don't try to fiddle it off ineffectually, a large amount of force applied gently is the way to do it. Edited February 17, 2020 by 250swb 2 Link to post Share on other sites More sharing options...
Peter Kilmister Posted February 17, 2020 Share #5  Posted February 17, 2020 I think @250swb has the sensible approach. However, my dear late mother had a trick up her sleeve that still amazes my wife when I demonstrate it. (My late father called my mother a Welsh Witch because this was so successful!) Get a wooden spoon and, holding the spoon end, gradually tap its handle along the edge of something that is stuck. Move the tapping motion in the direction you would turn to unscrew (anti-clockwise). After a few knocks (15 to 25) the locked item is suddenly easy to move. Because you would be using an object that can do no harm it is worth a try before resorting to strength. Link to post Share on other sites More sharing options...
AeroMirage Posted February 18, 2020 Share #6 Â Posted February 18, 2020 A way to get a good grip on it is to put a wide rubber band around it then try grasping and turning it. Link to post Share on other sites More sharing options...
lct Posted February 18, 2020 Share #7 Â Posted February 18, 2020 Advertisement (gone after registration) Before damaging anything, you may wish to put the lens upside down on a rubber surface (eg a rubber sole). Then turn it anti clockwise while pressing it gently onto the rubber. May work perfectly... or not but there is no harm to try. 1 Link to post Share on other sites More sharing options...
Harpomatic Posted February 18, 2020 Author Share #8  Posted February 18, 2020 Many thanks everyone! I tried most of the non damaging approaches, except the wooden spoon trick! I’ll definitely try that one later.  I think I will have to go the hard way on the filter and be very careful not to nick the lens. I will let you know which one works...but after all the tries I had my hopes are not really high! Link to post Share on other sites More sharing options...
Reini Posted February 18, 2020 Share #9 Â Posted February 18, 2020 https://www.youtube.com/watch?v=J3WhQ6ya-AQ Â Link to post Share on other sites More sharing options...
pgk Posted February 18, 2020 Share #10 Â Posted February 18, 2020 I have a flange stuck on an old lens. I've tried to remove it with no effect so its going to go off to a professional repairer because they will have appropriate tools to grip both areas which need holding tight without damaging. If your filter is brass and deformed I'd let someone who knows what they are doing sort it out for you because forcing it or cutting it both risk damage to the lens even if you are very careful. I'm a photographer, not a camera'/lens repairer and whilst I will attempt things as far as I can there comes a point when you have to know when to stop and let someone who has experience of the problem, and who has the tools to sort it out, deal with it. Just mu opinion of course, but regretting not getting it professionally sort after damaging the lens is more than irritating. Link to post Share on other sites More sharing options...
Ecar Posted February 18, 2020 Share #11  Posted February 18, 2020 You could try one of these: https://www.youtube.com/watch?v=mQ9Paz4zSD8 I have used it once and it works. Especially if you don't mind damaging the filter. I'd be more careful (ie, try it first on a junk lens) if I had to use it on the lens rim itself. Link to post Share on other sites More sharing options...
Harpomatic Posted February 18, 2020 Author Share #12  Posted February 18, 2020 3 hours ago, Reini said: https://www.youtube.com/watch?v=J3WhQ6ya-AQ  That’s what I was afraid I had to do...we’ll see if I can avoid it! But thanks for the link! Link to post Share on other sites More sharing options...
Harpomatic Posted February 18, 2020 Author Share #13  Posted February 18, 2020 13 minutes ago, Ecar said: You could try one of these: https://www.youtube.com/watch?v=mQ9Paz4zSD8 I have used it once and it works. Especially if you don't mind damaging the filter. I'd be more careful (ie, try it first on a junk lens) if I had to use it on the lens rim itself. Wow, never seen that one before! Thanks for the link! But I’m not sure it would unstick the filter...🤔 Link to post Share on other sites More sharing options...
Harpomatic Posted February 18, 2020 Author Share #14  Posted February 18, 2020 I know I should send it to a pro, but that gets really expensive really quickly, not mentioning the time frame. Would you guys have someone in mind in UK? I’m close to Heathrow Airport, outside London Link to post Share on other sites More sharing options...
pgk Posted February 18, 2020 Share #15  Posted February 18, 2020 36 minutes ago, Harpomatic said: I know I should send it to a pro, but that gets really expensive really quickly, not mentioning the time frame. Would you guys have someone in mind in UK? I’m close to Heathrow Airport, outside London I'd try Fixation in London https://www.fixationuk.com they are part of WEX, are authorised repairers for pro gear and are usually helpful and reasonably quick. Phone them first and see what they say. Link to post Share on other sites More sharing options...
Harpomatic Posted February 18, 2020 Author Share #16  Posted February 18, 2020 36 minutes ago, pgk said: I'd try Fixation in London https://www.fixationuk.com they are part of WEX, are authorised repairers for pro gear and are usually helpful and reasonably quick. Phone them first and see what they say. Thanks for the link! Link to post Share on other sites More sharing options...
jaeger Posted February 18, 2020 Share #17 Â Posted February 18, 2020 hair dryer? 1 Link to post Share on other sites More sharing options...
sblitz Posted February 18, 2020 Share #18 Â Posted February 18, 2020 heat!!!!! the metal around the filter will expand more than the lens .... has always worked for me when the rubber band method fails. Â Link to post Share on other sites More sharing options...
250swb Posted February 18, 2020 Share #19  Posted February 18, 2020 (edited) 3 hours ago, jaeger said: hair dryer? So with a hair dryer you can localise heat onto the lens barrel to make it expand and not the filter? I suppose you could rub an ice cube over the filter ring at the same time, but heat is usually used to break a stuck seal, such as dried grease, not to shift a deformed filter ring. And what a camera techie will do is exactly what I said in post #4. Edited February 18, 2020 by 250swb Link to post Share on other sites More sharing options...
AndreasG Posted February 18, 2020 Share #20 Â Posted February 18, 2020 And when the filter has been removed successfully, most probably the lens thread needs to be recut: https://www.jackthehat.co.uk/lens-repair-vise-tool-fixing-filter-threads-p-1186.html Link to post Share on other sites More sharing options...
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