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GLThorne · 03-09-2007, 11:43 AM

Well, I must admit that I'm the proud new owner of a Sigma 100-300 F/4 EX DG APO lens. IT'S AWESOME!!!

Auto-focus is almost instantaneous.

Got the lens and the Sigma DG multi-layer 82mm filter yesterday and noticed the filter had a smudge. No problem one would think as I pulled out the handy lens cloth and expected the smudge to disappear. WRONG. The filter has some type of oily/gooky/harder than the devil stuff on it that I can't get off. I've got it where most people wouldn't notice it, BUT I do. What types of cleaners does everyone out there use for their lenses?

roy · 03-09-2007, 12:09 PM

i read bosrds about disassembly of lens to clean them. a lot of the coating are on the inside of the lens. a lot of these people use acetone for the really tough stuff.

**jfdavis58** · 03-09-2007, 12:28 PM

A PEC pad and Eclipse in the field. Sometimes a good optical glass cleaner like for eyeglasses and a microfiber cloth. For real gunk: ROR (Residual Oil Remover) and either cloth--www.ror.net.

roy · 03-09-2007, 12:42 PM

i'll bet that's the same as eclipse. 100% grain alcohol.
greg, you can also use white lightening. the sell it in liquor stores. 190 proof will work fine.

**jfdavis58** · 03-09-2007, 01:37 PM

ROR?-no, it's not eclipse

kbrabble · 03-09-2007, 01:41 PM

I will second the recommendation for ROR.. I have had excelent results with it on some pretty goobered up lenses....

03-09-2007, 11:43 AM	#1
GLThorne Veteran Member Join Date: Jan 2007 Location: USA - South Carolina Photos: Gallery Posts: 372	Lens cleaning question (Sigma 100-300 F/4) Well, I must admit that I'm the proud new owner of a Sigma 100-300 F/4 EX DG APO lens. IT'S AWESOME!!! Auto-focus is almost instantaneous. Got the lens and the Sigma DG multi-layer 82mm filter yesterday and noticed the filter had a smudge. No problem one would think as I pulled out the handy lens cloth and expected the smudge to disappear. WRONG. The filter has some type of oily/gooky/harder than the devil stuff on it that I can't get off. I've got it where most people wouldn't notice it, BUT I do. What types of cleaners does everyone out there use for their lenses?

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03-09-2007, 12:09 PM	#2
roy Inactive Account Join Date: Sep 2006 Location: D/FW area, Tx. Photos: Gallery Posts: 1,710	i read bosrds about disassembly of lens to clean them. a lot of the coating are on the inside of the lens. a lot of these people use acetone for the really tough stuff.

03-09-2007, 12:28 PM	#3
jfdavis58 Site Supporter Join Date: Nov 2006 Location: 13 S 0357397-3884316 Photos: Gallery Posts: 887	A PEC pad and Eclipse in the field. Sometimes a good optical glass cleaner like for eyeglasses and a microfiber cloth. For real gunk: ROR (Residual Oil Remover) and either cloth--www.ror.net.

03-09-2007, 12:42 PM	#4
roy Inactive Account Join Date: Sep 2006 Location: D/FW area, Tx. Photos: Gallery Posts: 1,710	i'll bet that's the same as eclipse. 100% grain alcohol. greg, you can also use white lightening. the sell it in liquor stores. 190 proof will work fine.

03-09-2007, 01:37 PM	#5
jfdavis58 Site Supporter Join Date: Nov 2006 Location: 13 S 0357397-3884316 Photos: Gallery Posts: 887	ROR?-no, it's not eclipse

03-09-2007, 01:41 PM	#6
kbrabble Senior Member Join Date: Sep 2006 Posts: 181	I will second the recommendation for ROR.. I have had excelent results with it on some pretty goobered up lenses....

Lens cleaning question (Sigma 100-300 F/4)

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