At 06:49 AM 06/04/2010, you wrote: > > Whatever they use to coat the glass, is very effective ... > > but very difficult to clean! > > > > > > >I have experienced this with every filter brand so far: Hoya HMC, Hama MC, >and Heliopan MC. >The only brand that is easy to clean, and I mean easy, is B+W with MRC >coating. Thoug I read Hoya HD is catching up in this regard. >Miha Until now, Miha, I have always had B+W filters, and so, perhaps, I am spoiled. Still, once clean, the Sigma's seem to stay that way, and do the job, very nicely. Cheers! ------------- David Young - Photographer Logan Lake, BC, Canada Wildlife & Sports: www.furnfeather.net Personal pages: www.main.furnfeather.net A micro-lender through KIVA.org. ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/