On 15 May 2005 at 8:38, Bob Blakely wrote: > Ain't film wonderful! the grain is entirely random! No anti-aliasing filter > required! FYI, anti-aliasing filters are not like the ubiquitous UV filter. By > their nature, they must add minor, shall we say, distortions to perform their > function.
Film grain is just like natural dither, it affects the captured image to more or less degree depending upon the film type and format or film area. AA filters in digital systems should be matched precisely to the sensor in order to eliminate aliasing distortions and to provide a natural fall off of resolution. AA filters don't introduce distortion they should eliminate it by band limiting resolution, they don't introduce artifacts like the essentially random nature of grain in film. From the perspective of distortion and accuracy in image recording if resolution was equal I'm sure I'd prefer a digital system over analogue film in 9 out of 10 scenarios. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
