rbaron Posted March 25, 2017 Share #1 Posted March 25, 2017 Advertisement (gone after registration) I've just acquired a 35mm Summilux preASPH, made in Germany, to use on my MP 240. It came with a Leica # 12504 lens hood, also made in Germany. The hood clips on to the lens and from my research it appears the hood unscrews and separates into two parts so you can put a filter in it and I'd like to do that but it probably hasn't been unscrewed in decades and is stuck tight. I'm neither technical nor mechanical minded so I'm looking for suggestions. I thought about moistening a q-tip with some WD40 lubricant and swabbing around the 'seam' but I'd sure hate for that to get into the lens somehow. I suppose I could send it off to a repair person like DAG but this shouldn't be rocket science and I should be able to loosen the threads myself. Or should I? Thanks, --Bob p.s. Moderators, if I should have posted this in a different sub-forum please feel free to move it. Link to post Share on other sites More sharing options...
Advertisement Posted March 25, 2017 Posted March 25, 2017 Hi rbaron, Take a look here How To Unscrew a 12504 Lens Hood?. I'm sure you'll find what you were looking for!
lct Posted March 26, 2017 Share #2 Posted March 26, 2017 [...] I thought about moistening a q-tip with some WD40 lubricant and swabbing around the 'seam' but I'd sure hate for that to get into the lens somehow. [...] I'd just remove the hood to do this and clean it before putting it on the lens again. Before that i would use the same trick as for filters. Put the hood upside down on a rubber surface (eg a rubber sole) and turn the hood anti clockwise while pressing it gently onto the rubber. May work perfectly... or not . Link to post Share on other sites More sharing options...
pico Posted March 26, 2017 Share #3 Posted March 26, 2017 First remove the lens hood from the lens before applying chemical thread breakers! WD-40 is popular but far from the best solution. pb blaster is the best. WD-40 is excellent for purging moisture from anything, but it is not a lubricant nor a thread solvent, Link to post Share on other sites More sharing options...
rbaron Posted March 26, 2017 Author Share #4 Posted March 26, 2017 I'd just remove the hood to do this and clean it before putting it on the lens again. Before that i would use the same trick as for filters. Put the hood upside down on a rubber surface (eg a rubber sole) and turn the hood anti clockwise while pressing it gently onto the rubber. May work perfectly... or not . That old trick worked perfectly. Thanks for reminding me how to do it! Link to post Share on other sites More sharing options...
rbaron Posted March 26, 2017 Author Share #5 Posted March 26, 2017 First remove the lens hood from the lens before applying chemical thread breakers! WD-40 is popular but far from the best solution. pb blaster is the best. WD-40 is excellent for purging moisture from anything, but it is not a lubricant nor a thread solvent, Thanks for the recommendation. I had not heard of pb blaster but have done some quick research and it looks like something I need to have in my toolbox. Link to post Share on other sites More sharing options...
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