On 24/04/07, Jack Davis <[EMAIL PROTECTED]> wrote: > I can only hope. ;)
Lifted directly from a post I made re lens cleaning Nov 2000: In an except from the Leica Fotographie International magazine 6/99 page 37 the following can be found: "The resistance and adhesive power of the outer layer is so good that there is little likelihood of damage by environmental influences or persistent cleaning on the part of the user. Numerous abrasion tests have been carried out. There is one that uses a rubber eraser which contains up to 50% pumice-stone grains. The standard test is to rub backwards and forwards 20 times with a pressure of 1kg. Afterwards, no scratches should be visible on the lens surface." Although this passage refers to Leica coatings and practices I would be quite disappointed if the late Pentax coatings didn't exhibit the same wear resistance. Anyone care to run the above test on a neglected piece of SMC hardware? Cheers, -- Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://picasaweb.google.com/distudio/PESO http://home.swiftdsl.com.au/~distudio//publications/ Pentax user since 1986, PDMLer since 1998 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
