Archived posting to the Leica Users Group, 2000/11/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]In the one I originally snipped it and part of that is below.....it appeared Erwin was saying it to be at least 1920 x 2880.... But is he then saying that it is then needs to be multiplied by 4 or 7680x11520 to get the 40 lp resolution he was talking about??? If Erwin is saying 1920 x 2800, that seems low being used to the resolution from scans in photoshop.... but we are dealing with at least two seperate animals.... one being original CMOS capture and the other scanning from film. The reason I say that is based on the comparisons of film and the D30 (which has 1440 x 2160 resolution).... although according to Reichmann.... to get a 10 x 13 print that equals film from the D30 on his inkjets, you need to step up res with Genuine Fractals or something... If it is 7680 x 11520 Erwin is refering to... well that is a monster 253.2 mb file. 12.8 inches by 19.2 at 600 dpi. If that is not equivalant to film...am I missing something??? On the other hand... If Jim Brick thinks Erwin's explanation is correct.... I would be hard pressed to believe that it is wrong. It might take some serious explaining for all of us to figure out what they are saying though as I think we are making some wrong assumptions based on Erwin's frustration in his response... From experience I know a number of brilliant electrical engineers who can't explain things in a coherant manner.... they can design, build and fix anything electronic... but just don't ask them to explain what, how and why to a non-engineer... Duane Birkey HCJB World Radio Quito Ecuador Duane's Photographs of Ecuador http://duane_birkey.tripod.com I'll snip a bit more from my original snip of what Erwin wrote: So on the assumption of 40 lp/mm (80 lines) as an industry standard (BTWthis resolution gives salon quality exhibition prints of size 40 x 50cm, a 35mm negative capturing 24 x 80 x 36 x 80 lines has a number of pixels or image points of 5.5 million. This figure is independent of whatever grain size. Now a new CMOS chip with 16.8 million pixels needs 4 pixels to repesent one image point. The 16.8 million divided by 4 gives more than 4 million true image points.