Archived posting to the Leica Users Group, 2000/02/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hello Horst, There is a French company that make curved filters. I guess the real reason is that it is far more easy to make 2 parallel curved surfaces and to coat them than flat ones. That might explain why your filter was so good. All the best, - -- Jean-Claude Berger (jcberger@jcberger.com) Systems and RDBMS consultant (MCSE) Lyon, France http://www.jcberger.com > -----Original Message----- > From: owner-leica-users@mejac.palo-alto.ca.us > [mailto:owner-leica-users@mejac.palo-alto.ca.us]On Behalf Of A.H.SCHMIDT > Sent: Sunday, February 13, 2000 12:44 PM > To: leica-users@mejac.palo-alto.ca.us > Subject: [Leica] Re: UV Ghostless filters > > > This filter did not have a flat ground glass, but it was curved. A > similar curve (snip) > Pentax does not sell those filter anymore. Do any of you have an > idea, why this > idea was not further used and developed.. Did I only imagine, that > this filters > don't degrade the image?. > > There must have been some reason why they have been discontinued. But what?. > If any of you know some more about this, I would be interested to > hear about it. > > Regards, Horst Schmidt > > > >