Colin O Posted April 25, 2020 Share Posted April 25, 2020 At the end of the Hoya filter catalog <HOYA | Downloads>, in the filter size list, there is some info on coating. Some filters in the "PRO ND Series" are listed as having a "PNC" coating. Can anyone tell me what PNC means? Could it just be "Pro ND Coating"?? If that's it, it seems pretty meaningless to me. Link to comment Share on other sites More sharing options...
SCL Posted April 25, 2020 Share Posted April 25, 2020 Nano Coating Link to comment Share on other sites More sharing options...
Colin O Posted April 25, 2020 Author Share Posted April 25, 2020 I didn't read the catalog/brochure carefully enough - there is a page explaining the different coatings. It says: PRO ND coating is the coating which had reduction of reflectance, and a neutral damping characteristic to the broadband. PRO ND coating is given to both sides of the polished glass, and the filter is assembled with structure with few optical leaks. ...whatever that means! Link to comment Share on other sites More sharing options...
SCL Posted April 26, 2020 Share Posted April 26, 2020 Pro ND filters are Hoya's Pro line of neutral density filters. The PNC is a relatively new technology incorporating nano coating particles, which substantially reduce reflectivity. Link to comment Share on other sites More sharing options...
Robin Smith Posted April 26, 2020 Share Posted April 26, 2020 Nano coating usually means they don’t get so dirty, and if/when they do it is easier to clean. The multi coating properties of reducing flare will be much the same as a non nano coated lens. It’s worth having on a filter you use a lot, but otherwise may not be worth the extra. Robin Smith Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted April 27, 2020 Share Posted April 27, 2020 Nano coating usually means they don’t get so dirty, and if/when they do it is easier to clean. The multi coating properties of reducing flare will be much the same as a non nano coated lens. It’s worth having on a filter you use a lot, but otherwise may not be worth the extra. So, err, why did Nikon only use nano-coating on the inside surfaces of their lenses during its early development? Nikon also clearly state that nano-coating is used for its superior anti-reflective properties. Link to comment Share on other sites More sharing options...
Robin Smith Posted April 27, 2020 Share Posted April 27, 2020 They're that too, but my understanding is it usually means they're easy to clean. It is indeed possible that the nano for low surface tension (easy to clean) is different from the nano for improved coatings. I like the easy to clean nano, the other I take with a grain of salt since improved coatings are a fail safe claim said of all new lenses. Robin Smith Link to comment Share on other sites More sharing options...
andylynn Posted April 27, 2020 Share Posted April 27, 2020 I don’t know about filter nano coating, but Nikon lens nano coating is supposed to be great at reducing reflections, but also soft and easily damaged. So they put it on the interior surfaces that are not meant to be cleaned by the user. Link to comment Share on other sites More sharing options...
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