On Sat, 1 Mar 2003, Cameron Hood wrote: > BTW, pardon my ignorance, but why do digital cameras need a shutter at > all?
That's because most of the high pixel count CCDs are of interlace design (instead of progressive scan). Similar to video scan lines, even lines are read first, then odd lines. So if there is any movement of objects or camera, you will see the blurring. That's why a mechanical shutter is necessary. If you have a progressive scan CCD, yes, then you do not need a mechanical shutter. The shutter would be completely electronic. -- --Lawrence Kwan--SMS Info Service/Ringtone Convertor--PGP:finger/www-- [EMAIL PROTECTED] http://www.vex.net/~lawrence/ -Key ID:0x6D23F3C4--
