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Old July 14th, 2003, 04:41 PM   #1
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Focus Ring making Grinding noise...

all of a sudden my focus ring is making a slight grinding noise as though there is a grain of sand in there. its still hella smooth, but the noise worries me.
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Old July 14th, 2003, 04:47 PM   #2
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Could be a grain of sand---perhaps a little screw fell out.




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Old July 14th, 2003, 08:51 PM   #3
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I had the exact same problem a month ago after i took off the lensshade to try on some filters. Scared the crap out of me but after 1/2 hour or so spinning it back n' forth the grinding noise finally went away. I agree it does sound like a small solid got into the focus ring track. Try a can of compressed air and a camel brush.
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Old July 15th, 2003, 01:33 AM   #4
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i have an aircompressor and tried it, but nothing.

you know what? i noticed it after i took off the lense guard too! hmm!

yeah im spinning it alot now to grind it down or whatever. its working slowly but surely.

----EDIT: damn, now it just sounds like its scraping the sides. not a grinding, but scraping lightly :(
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Old July 15th, 2003, 06:57 AM   #5
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yeah when you take off the lens shade, the groove bettewen the ring and the lens is fully exposed. Not a very good design I might add.
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Old July 15th, 2003, 01:33 PM   #6
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Same thing happened to me: removed lens shade, replaced, focus slightly grinding. I think it could be that even when the lens shade is tightened completely down, there's still a little play with the shade backward and forward and if it's pushed back, it impedes on the focus ring. Try pulling the shade forward a little. It worked for me.

I will, however, check for sand and grit around the lens as well. Never occurred to me that could also be the problem.
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Old July 15th, 2003, 02:22 PM   #7
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Don't use pressed air. Just use a vac cleaner and try to suck the zones where the sand could have entered while you slowly rotate the ring
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Old July 15th, 2003, 03:34 PM   #8
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Unless you're using some miniature computer vac, most household vacs stir up a lot of dust and particles around it when it's turned on, vacumming your ring with the shade off just might get more dirt into it.
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Old July 15th, 2003, 04:01 PM   #9
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moving the lens shade didnt do anything for me, because when i remove it all together it still makes the sound. i want to get a micro screw or whatever and take off those lil screws and the cover of the lens to see if i can solve it that way.
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