Dickbo wrote: > > ----- Original Message ----- > From: "Wilson, Paul" <[EMAIL PROTECTED]> > > Can anyone explain just why manufacturers seem unable to produce a full > 36x24mm CCD sensor.
One known problem is that the light being off center has an increasing entry angle, what works fine with conventional flat film, but the photo sensitive cells have some depth from the surface and they can not work with light entering them non perpendicular. Our human eye has the photocells located on an internal side of a sphere and thus the light rays always arrive perpendicular to them. We are still are superior with our "bio CCD'c". The problem with flatness of the CCD and CMOS sensors dictated even modifications in lens design. You might browse the web pages of Olympus, the E-20N specifically. I read there recently an article about details of their new Zuiko Lenses for the Pro cameras, which in my opinion utilize much better through their shape and design the digital orientation, as compared to Nikon's and Canon's big SLR remakes. My impression that this Olympus outranks now all the D-1's but the atrraction of using all the expensive glass can not be ignored. The *.pdf E-20N brochure depicts a cross cut of a conventional 35mm lens as compared to the new lens made for the current CCD or CMOS sensors. I am sure that till we will be able to make non-flat semiconductors this problem will be always there and require some special treatment, of which none will really replace the real thing, what is a semisphere. Thomas. > ---------------------------------------------------------------------------------------- Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body
