Archived posting to the Leica Users Group, 2012/07/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Here are the Daguerreotype Plate sizes worked into pixels from the I think original Cm sizes Whole Plate: 6.5 x 8.5 inches (16.5 x 21.5 cm) 462 x 602 pixels Half Plate: 4.25 x 5.5 inches (11 x 14 cm) 308 x 392 Quarter Plate: 3.25 x 4.25 inches (8 x 11 cm) 224 x 308 Sixth Plate: 2.75 x 3.25 inches (7 x 8 cm) 196 x 224 Ninth Plate: 2 x 2.5 inches (5 x 6 cm) 140 x 168 Sixteenth Plate: 1.375 x 1.625 inches (3.5 x 4 cm) 98 x 112 Its the cm size times 28 Introducing the numbers 28 and 72 to them certainly does not turn them into any warm and fuzzy numbers. Here was the conversions from inches. 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 Its like translating the bible from Greek instead of Hebrew. Or whatever it was originally written in. - - from my iRabs. Mark Rabiner http://gallery.leica-users.org/v/lugalrabs/ > From: Mark William Rabiner <mark at rabinergroup.com> > Date: Tue, 10 Jul 2012 17:11:27 -0400 > To: Leica Users Group <lug at leica-users.org> > Conversation: [Leica] Daguerreotype Plate Sizes at 72 dpi > Subject: Re: [Leica] Daguerreotype Plate Sizes at 72 dpi > > 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