On 14/06/07, Anthony Farr <[EMAIL PROTECTED]> wrote: > This is interesting enough to get me out of lurkdom. > > It's clearly not an accessory filter, but something for manufacturers to > use. I reckon that it's to do with the Bayer grid, and I suspect that > current RGB filters may have lots of neutral density to ensure their > spectral purity. Looks like Kodak has found a way to trim some of that ND.
I don't believe that with current technologies there is a need to add ND buffering to manage spectral sensitivities, they are working at near the theoretical limits now and any sensitivity variations between the colour channels can be negated during RAW conversion. Kodak have simply dropped half of the colour filters so that half of the photo sites register full spectrum luminance. AS you would expect sensitivity increases but colour purity/edges will likely suffer, there's always a compromise. More information can be found at: http://1000nerds.kodak.com/ http://kodak.com/eknec/PageQuerier.jhtml?pq-path=2709&pq-locale=en_US&gpcid=0900688a80720f9d > Does anyone know if Bayer filters are absorption filters or dichroic > filters? Absorptive I expect. -- Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://picasaweb.google.com/distudio/PESO http://home.swiftdsl.com.au/~distudio//publications/ Pentax user since 1986, PDMLer since 1998 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
