Archived posting to the Leica Users Group, 1999/09/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I had beeen told or read somewhere that silver film has an inherent resolution of 10 M Pixels per square inch and increasing on the T grain technology. For a 4x5 Neg, that is 200M Pixels, times 4 ( some say 3 ) colors per pixel, times 12 to 16 bits per pixel. GIve or take a bit, 1.6 GBytes per snap of the shutter. Say 10 Pictures per 20GB Hard disk. Divide by $200 per disk and you end up with a cost of $20 per picture. Ain't math great?..... Don't give up your silver film based cameras yet.....Digital cameras still have about an order of magnitude to go.... and that will become increasingly hard to attain as the pixels get smaller ( transistor geometries are bigger than chemical "clumps". In addition, the actual SIZE of the CCD that takes in the light is only a 1/4 to 1/3 to 1/2 inch device ( square inches or on a side? ) and the greed factor does not want to make this larger. Note: The issue of the number of pixels on film is a bit contorted, but basically it is represented by the number of individual grains ( or clumps????) that exist in or on the film emulsion. Each of these grains contains only a single level of light, and of a single color. Therefore represent the minimum particulate of the image, otherwise known on the computer world as a pixel. Frank Does anyone know how that resolution compares to film?