----- Original Message ----- From: "Howard" <howard.leigh@xxxxxxxxxxxx> Subject: Re: Digital Lenses > Just reading through all the correspondence again on digital lens design > makes me question one aspect. > > If the light projected by a lens designed specifically for digital > cameras, works differently to one designed for 35 mm cameras, then I > would expect to see a significant performance difference between them > when attached to the "wrong" camera. > > My little experience suggests that it's pretty small. The major > difference is the smaller usable image size, enabling DC specific lenses > to be made smaller. > > However the problem in lens design is, I think, that the 35mm film plane > is flat whereas a digital sensor is not! > > Carrying out a search in Netscape for > Designing Digital Lenses > gave > http://www.megapixel.net/html/articles/article-43.html > which is an article with some valuable ideas and diagrams. > > Howard The difference is small, Howard. But you got something reversed. The film plane is not flat, the chip, light sensor is flat. Film has a depth of gelatin emulsion and the chip doesn't. Why would you want to design a lens? S.
