Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
06-11-2012, 07:47 PM   #1
Loyal Site Supporter
bwDraco's Avatar

Join Date: Jul 2010
Location: New York
Photos: Albums
Posts: 1,009
B+W XS-Pro Digital filter easily scratched--MRC nano coating problem?

My 62mm B+W XS-Pro Digital filter with MRC nano coating (on my DA 18-135mm lens) seems to be much easier to scratch than my other B+W F-Pro filters. The filter is quickly accumulating fine scratches near the edge where the lens cap may contact the filter glass--but this isn't reproducible on lenses with B+W F-Pro filters, which have the regular MRC coating. The impact on image quality is probably zero in practice, but I'm worried about the integrity of the filter. Is the MRC nano coating softer than the regular MRC coating? It's getting scratched even by a microfiber cloth, which certainly isn't normal...

NB: The lens cap is being attached in a different manner than with my other lenses because the lens hood is attached while I cap the lens, and the lens cap may contact the filter glass as I attach the lens cap. However, MRC is supposed to be harder than glass and therefore should be nowhere near this easily scratched, so is there a problem with the MRC nano coating?


Last edited by bwDraco; 06-11-2012 at 08:10 PM.
06-12-2012, 07:43 PM   #2
Inactive Account

Join Date: Feb 2012
Posts: 92
I just bought two B+W XS-Pro MRC Nano Circular polarizers from B+H. Both filters looked like they had a different coating on it. The coating on the 49mm was jacked up right out of the box and was sent back for replacement. The coating on the 49mm looked like it had a purple hue when it was held up to the sunlight and the coating on the 52mm looked to be grayish when held up to the sunlight. I'm not sure what the cause of the difference in colors to be. I would have thought both filters should look the same so I'm wondering if they changed something in the manufacturing process. What color is your filter when you hold it up to the sunlight, purple? I'm worried about scratching the filters.

The "purple" coating on the 49mm looked rubbed off by the mounting ring and had a tiny mark/scratch on the front side that could not be cleaned off. The "grey' 52mm on the other hand could have the haze wiped off the filter with no ill effects and seems to be O.K.... I'm trying to be extra careful with it...I even take off the lens hood when I turn the filter or put the lens cap on.

  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
cap, filter, filters, glass, lens, mrc, nano, pentax help
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: B+W 62MM MRC UV-HAZE F-PRO Filter gofour3 Sold Items 0 12-31-2011 09:44 AM
For Sale - Sold: B+W UV-Haze 010 MRC NANO XS-Pro 67mm Filter - New In Box frank Sold Items 0 10-17-2011 08:32 AM
For Sale - Sold: B+W 49mm UV HAZE Filter MRC 010M F-Pro Multi Coat (US) pcarfan Sold Items 0 12-14-2010 06:47 PM
Which UV filter - Hoya Pro1 Digital or B+W F-Pro? rrobinson54 Pentax DSLR Discussion 2 12-11-2007 10:03 PM

All times are GMT -7. The time now is 08:29 PM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]