Archived posting to the Leica Users Group, 2008/06/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The kind of really smart and cool stuff we expect from Rollei usually. But I feel like to be correct we should not be referring to it as a "filter". mark@rabinergroup.com Mark William Rabiner > From: Henning Wulff <henningw@archiphoto.com> > Reply-To: Leica Users Group <lug@leica-users.org> > Date: Fri, 13 Jun 2008 15:54:18 -0700 > To: Leica Users Group <lug@leica-users.org> > Subject: Re: [Leica] M8 and the WAR > >> Jim und David, >> >> Let it be Known that the Rolleiflex Infra-Red filters have a "lens >> correction" >> built into them to compensate for IR focus shift. >> >> BTW, I have a Leica E-39 size IR filter available, should anyone want it. >> >> Jerry >> > > > > > That's interesting. > > I assume it's a slight diopter ground into the filter, to compensate > for some specific IR wavelength (which any specific film may or may > not be sensitive to). > > > -- > * Henning J. Wulff > /|\ Wulff Photography & Design > /###\ mailto:henningw@archiphoto.com > |[ ]| http://www.archiphoto.com > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information