> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > [EMAIL PROTECTED] > Sent: Wednesday, September 25, 2002 2:24 PM > To: [EMAIL PROTECTED] > Subject: EOS Lens Coating > > > Just bought a used Canon 20 mm lens and noticed that there is a > small, say > 3-4 mm x 1/2 mm defect in the front element. I call it a defect > because I am > not really sure what it is. It doesn't look like a > scratch...maybe a defect > in the coating. But it is almost directly in the center of the > glass. You > can only really see it when you hold the lens in the light and see the > reflection off of the defect as a different and more solid > appearing color > then the rest of the glass (sort of like the color of the > reflective portion > of a soap bubble). Otherwise it is in perfect condition. Is > this likely to > be a problem or have any negative effect on the images in this > location and > focal length? > > Howard >
Hi Howard, I doubt you will see any effect from this minor flaw even if you cannot get it off the front element of your new lens. If you are lucky it may just be dirty! I've purchased several used, mint condition lenses that looked like there were flaws in the lens coating (for much lower negotiated prices!), and managed to have a like new lens with a little bit of cleaning with a "Lens Pen" lens cleaning tool. I don't know what's on the little pad that you use to clean the lens with but it seems to take off ANYTHING on the lens coating without leaving any evidence that it was there! Try one you may be surprised at the results, you could end up with a perfect front lens element for a $10 investment. Cheers/Chip * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
