----- Original Message ----- From: "Howard" <howard.leigh@xxxxxxxxxxxx> Subject: Re: Digital Lenses
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.
You are probably right, Steve.
However, it seems to me that the reason for need for the parallel approach of the light rays to a CCD though is well explained and illustrated in the megapixel.net article
If the rays do not arrive vertically they will go in at an angle (doh!!) and hit the sensor through the wrong colour filter, producing a distortion in the image's colour.
How's that?
Howard
