Archived posting to the Leica Users Group, 2012/07/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Not 32 but 28 Conversion table DPI (dot/in) dpcm (dot/cm) Pitch (?m/dot) 72 28 350 " There are some ongoing efforts to abandon DPI in favour of metrication, giving the inter-dot spacing in dots per centimetre (dpcm) or micrometres (?m).[5][6] A resolution of 72 DPI for example equals a resolution of about 28 dpcm or an inter-dot spacing of about 350 ?m." - - from my iRabs. Mark Rabiner http://gallery.leica-users.org/v/lugalrabs/ > From: Philippe Amard <philippe.amard at sfr.fr> > Reply-To: Leica Users Group <lug at leica-users.org> > Date: Tue, 10 Jul 2012 22:52:22 +0200 (CEST) > To: Leica Users Group <lug at leica-users.org> > Subject: Re: [Leica] Daguerreotype Plate Sizes at 72 dpi > > Are you sure the unit used then was the inch? I'm sure the photos will be > better if you use cms ;-) Nice idea about the format, unsure about the > pixel count though. AMiti?s Philippe Tous vos emails en 1 clic avec > l'application SFR Mail sur iPhone et Android - En savoir > plus. ======================================== Message du : 10/07/2012 > 22:04 De : "Mark Rabiner " <mark at rabinergroup.com> A : "Leica Users Group" > <lug at leica-users.org> Copie ? : Sujet : [Leica] Daguerreotype Plate Sizes at > 72 dpi Whole plate 6-1/2" x 8-1/2" 468 x 612 pixels Half plate > 4-1/4" x 5-1/2" 306 x 396 Quarter plate 3-1/4" x 4-1/4" 234 x > 306 Sixth plate 2-3/4" x 3-1/4" 198 x 234 Ninth plate 2" x > 2-1/2" 144 x 180 Sixteenth plate 1-3/8" x 1-5/8" 99 x 117 I > worked the math on these plates sizes into pixels. I plan on working up some > images at these sizes which perhaps will have some resonance in our photo > DNA. Sometimes I plan on just entering the inch sizes at whatever resolution > I'm using on the print. As they are a bit small for the screen even. I really > don't know. Maybe I'll find myself using these all the time. Or hardly ever. > But It was fun doing it. - - from my iRabs. Mark > Rabiner http://gallery.leica-users.org/v/lugalrabs/ _______________________ > ________________________ Leica Users Group. See > http://leica-users.org/mailman/listinfo/lug for more > information _______________________________________________ Leica Users > Group. See http://leica-users.org/mailman/listinfo/lug for more information