[Leica] Thumbs down for Lens Pen! ----tried and proven method

[grduprey at mchsi.com (grduprey@mchsi.com)]

Bill,

Isn't Acetone a rather agressive solvent?  I would think that would harm the 
coatings and other coatings/adhesives.

Gene


-------------- Original message from Bill Smith <wrs111445@yahoo.com>: 
-------------- 


> Awhile back here it was recommended to use the following method: 
> 
> 1.) use bulb blower. 
> 
> 2.) one application of pure, lab grade Acetone on a new Q-tip one one end 
> and 
> dry w/ the 
> other end. 
> 
> 3.) repeat #2 above w/ new Q-tip. 
> 
> 4.) one application of a "wetting agent" solution of one qt. bottle of 
> distilled water/ two drops 
> of a dishwashing detergent on a new Q-tip and dry w/ the other end.. 
> 
> 5.) repeat #4 above w/ a new Q-tip. 
> 
> I have used this method over and over on my lenses when they get dirty or 
> have 
> fingerprints and it works like a champ. 
> 
> 
> 
> G Hopkinson wrote: 
> Very likely you may not identify any loss of quality at all in practical 
> use 
> from what you are describing. For cleaning fingermarks, 
> I use the Zeiss optical cleaning mixture with microfibre cloths. I find it 
> to be 
> excellent. You can get Zeiss moistened wipes in 
> sachets, too. I think someone may have mentioned them. I bought a couple 
> of 
> hundred off the bay a while back. They are really easy 
> to carry and effective to use. While you are being careful, be sure to use 
> a 
> clean soft brush to gently remove any dust or grit 
> before you wipe with anything. Plenty of people on the list will tell you 
> that 
> modern Leica lens coatings are tough and I have no 
> doubt that is true. I am always careful cleaning, maybe more than I need 
> to be, 
> but there is certainly no harm in it. I have never 
> scratched any lens over quite a few years of camera handling. 
> 
> Cheers 
> Geoff 
> 
> -----Original Message----- 
> Subject: Re: [Leica] Thumbs down for Lens Pen! 
> 
> Ok, upon close inspection with a pen light through the front of the lens, 
> I 
> still have some oily residue left over. Looking at the 
> lens directly on held to a light source like a ceiling lamp, the lens 
> looks very 
> clear all the way through, but with a pen light a 
> see some slight leftover stuff, including dust in my lens. 
> 
> I don't recommend anyone use a pen light with their precious lenses if 
> they're 
> in anyway obsessive. You won't like what you see! Am 
> I being obssesive about my lens, or should I order some ROR and a new 
> microfibre 
> cloth from BH photo? Will it affect picture quality 
> is what I'm asking? 
> 
> Thanks, 
> G Medina 
> 
> 
> --- G Medina wrote: 
> 
> > I had a oily fingerprint in the rear element of my 28mm Contax G2 
> > lens. A microfibre cloth didn't work. 
> > Breathing on it didn't work either. Distilled water just moved the 
> > print around. I ordered the lens pen, and it also just shifted the oil 
> > around. So I researched several days and decided to give windex and a 
> > soft nose tissue a try. Believe it or not, it worked the best! I'm 
> > being very careful, so I've waited till morning to evaluate the 
> > result, but my result looked good last night. 
> > 
> > I'd be afraid to use this on a single coated 50's lens, but it seems 
> > to work nice on modern coated lenses. 
> > 
> > Anyone use Windex before? 
> > 
> > Thanks, 
> > G Medina 
> > 
> > 
> > 
> > 
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