Ecke, I will be very interested to know if the new filter eliminates the magenta concrete. That and VPN in dark skies are the two biggest problems with nocturnal photography with my K10D.
Rick http://photo.net/photos/RickW --- On Thu, 7/1/10, eckinator <[email protected]> wrote: > hi gang > > maybe this is old news to most of you but I thought I'd > post it anyway > in case it isn't > > got my recent aby steal, a B+W UV/IR-CUT filter in the mail > today and > replaced the Hoya Pro1 Digital MRC UV filter used so far > which despite > frequent old school cleaning - give it a good moist breath > and wipe it > with a piece of microfibre cloth - had lots of spots and > fingerprint > residue etc on it. I remember reading somewhere Hoyas have > a bad rep > for being hard to clean and so I broke out the lens > cleaning liquid > and a bunch of other stuff and the result was invariably a > colorful > smeary mess looking something like a wet oil stain in the > street if > you know what I mean. Tried helmet visor cleaning tissue > next, > eyeglass cleaning tissue, Olympus silicone impregnated lens > cleaning > parchment and everything I could think of. Same mess every > time. > > So I quit and googled "cleaning Hoya filters" thinking, > "heck I'll ask > PDML if I can't find anything". > > Sure enough the first result was > http://www.hoyafilter.com/products/hoya/coatings.html > where it says > "Never use any chemicals, such as lens cleaning fluid, on > your > filters, as these can damage the coatings. If any stubborn > stains > occur, these can usually be washed off with some clean > water and a > soft cotton cloth." > Big OUCH, I had used all apparently suitable chemicals at > my > disposal... so I let it soak in water for a while, found a > clean > cotton kitchen towel and gently rubbed. Some came off, some > didn't so > I rubbed harder, figuring the filter was probably ruined > anyway. But > guess what, every single stain came off, there is no lint > on the > filter, no scratches, no cleaning marks no matter which way > or side I > hold it into the light, under a light or shine one across > it. It looks > absolutely like new. I can't find a single fault. > > BTW I bought the B+W to test the claim that the K10D's AA > filter's IR > suppression is weak and that the filter will prevent color > casts > ("magenta concrete") in darker image areas. There won't be > a newer > Pentax for me in the near future so I have to squeeze the > best out of > what I have. If there is anything to report, I will pass it > on, if you > don't hear from me about this again I wasted a couple of > Euros. > > Cheers > Ecke > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link > directly above and follow the directions. > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
