Focus Ring making Grinding noise... at DVinfo.net

David Nussbaum · July 14th, 2003, 03:41 PM

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.

Frank Granovski · July 14th, 2003, 03:47 PM

Could be a grain of sand---perhaps a little screw fell out.

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They don't make 'em like they used to.

Yang Wen · July 14th, 2003, 07:51 PM

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.

David Nussbaum · July 15th, 2003, 12:33 AM

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 :(

Yang Wen · July 15th, 2003, 05:57 AM

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.

Stas Tagios · July 15th, 2003, 12:33 PM

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.

Andre De Clercq · July 15th, 2003, 01:22 PM

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

Yang Wen · July 15th, 2003, 02:34 PM

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.

David Nussbaum · July 15th, 2003, 03:01 PM

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.

July 14th, 2003, 03:41 PM	#1
David Nussbaum Regular Crew Join Date: Oct 2002 Location: Issaquah, WA Posts: 69	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. __________________ Proud Owner of the AG-DVX100 :D

July 15th, 2003, 12:33 AM	#4
David Nussbaum Regular Crew Join Date: Oct 2002 Location: Issaquah, WA Posts: 69	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 :( __________________ Proud Owner of the AG-DVX100 :D

July 15th, 2003, 03:01 PM	#9
David Nussbaum Regular Crew Join Date: Oct 2002 Location: Issaquah, WA Posts: 69	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. __________________ Proud Owner of the AG-DVX100 :D

July 14th, 2003, 03:47 PM	#2
Frank Granovski Outer Circle Join Date: May 2002 Location: Hope, BC Posts: 7,524	Could be a grain of sand---perhaps a little screw fell out. ---------------------------------------- They don't make 'em like they used to.

July 14th, 2003, 07:51 PM	#3
Yang Wen Major Player Join Date: May 2003 Location: Chicago, IL Posts: 991	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.

July 15th, 2003, 05:57 AM	#5
Yang Wen Major Player Join Date: May 2003 Location: Chicago, IL Posts: 991	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.

July 15th, 2003, 12:33 PM	#6
Stas Tagios Regular Crew Join Date: May 2003 Location: Los Angeles, Ca Posts: 38	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.

July 15th, 2003, 01:22 PM	#7
Andre De Clercq Major Player Join Date: Sep 2002 Location: Belgium Posts: 804	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

July 15th, 2003, 02:34 PM	#8
Yang Wen Major Player Join Date: May 2003 Location: Chicago, IL Posts: 991	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.