I understand that Igor. Despite what evidences of ignorance I may post here, I do know the difference between a lens and a filter.
I had assumed that the terminology originated when it was first applied to a lens that had the polarizing built into the lens itself, and that was later replaced by a filter that could be uses on any lens of an appropriate diameter. Dan Matyola http://www.pentaxphotogallery.com/danieljmatyola On Thu, Jul 23, 2015 at 11:33 AM, Igor PDML-StR <pdml...@komkon.org> wrote: > > Dan, > > And I assume you know why that would be incorrect usage? > Because (hopefully!) no "lensing" occurs in a filter (which is supposed to > have flat, plane-parallel surfaces). > > Cheers, > > Igor > > > > Daniel J. Matyola Thu, 23 Jul 2015 07:36:01 -0700 wrote: > > I thought that "PL" stood for "polarizing lens." > > Dan Matyola > http://www.pentaxphotogallery.com/danieljmatyola > > > > On Thu, Jul 23, 2015 at 10:32 AM, Igor PDML-StR wrote: > > <...> > >> >> Now, my 3 guesses that I mentioned yesterday but didn't write to avoid any >> bias were: lens, light, and luminescence that would be in the scientific >> term "circularly polarized luminescence". Obviously, none of these would >> be >> correct in "CPL filter". >> >> Igor >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > 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 PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
