On Mon, Sep 07, 2009 at 11:06:20AM -0400, Paul Stenquist scripsit: > After five years of digital, I have finally encountered a piece of dirt > that my ear blower won't dislodge. It's a small black spec in the middle > of my K7D sensor, invisible to the naked eye -- at least to my naked eye. > But it's definitely dirt, because it's size varies with the aperture > selected and it shows up on the dust alert test as a small dot. > > What's the best cleaning tool available? Preferably one that's somewhat > idiot proof.
I've had some success with a combination of a "digiswab" -- looks like a tiny squeegee -- and what they call "Ultrapure Optic Cleaning Fluid" and which is almost certainly 70%+ pure methyl alcohol, both from an outfit called American Recorder. Works well for crud on the mirror, too. (I was slow; it took me a couple outings to figure out the "face downwind when changing lenses" rule.) One puts two drops of fluid on the swab and makes two passes, flipping the swab and reversing direction between the passes. I've had to do this twice now, and my K20D has apparently avoided all harm both times. First time the drops were too big and I wound up drying the cover glass with a second, dry, swab, so the process must be at least slightly forgiving. Price is kinda piratical -- 6 swabs is 20 bucks Canadian -- but I don't suppose it's an item that sees frequent use. -- Graydon -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
