Archived posting to the Leica Users Group, 2000/07/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jean-Claude, I was wondering how or what this ACV actually was. Thanks for sharing this but I would have expected the dots needing to be in the middle of the lens rather than the edge, is that not the case? Jem - -----Original Message----- From: Jean-Claude Berger [SMTP:jcberger@jcberger.com] Sent: 16 July 2000 07:43 To: leica-users@mejac.palo-alto.ca.us Subject: RE: [Leica] Another (new) 15mm for Leica M (39mm) , the Panomigon 15mm f22 From what I understand, the Panomigon is a "concept lens" (a la concept-car) to demonstrate the ACV usability. ACV is more or less painting little black dots on the edge of internal lenses in order to compensate vignetting. - -- Jean-Claude Berger (jcberger@jcberger.com) Systems and RDBMS consultant (MCSE) Lyon, France http://www.jcberger.com > An effective aperture (with ACV, whatever that is!) of f/22, and at best > geometric aperture of f/11 doesn't bode well for either practicality nor > optical performance. > > I think I'll pass. > > * Henning J. Wulff > /|\ Wulff Photography & Design > /###\ mailto:henningw@archiphoto.com > |[ ]| http://www.archiphoto.com >