Thanks for that. Dave
On Fri, Mar 21, 2008 at 3:43 PM, Jos from Holland <[EMAIL PROTECTED]> wrote: > Interesting thread! > A few things I like to contribute: > > * No machine can fully compete with the AWB in our brains. A person > sitting under a green sunshade might get a greenish skin colour, > our brain knows about this effect and corrects for it. The > greenish skin colour might remain un noticed by us. But looking to > the picture later we see a greenish face! The question is : what > do we want in our photographes? Reallity (in the above example > greenish skin colour) or natural looking colours? I always go for > the last one meaning I have to correct in post processing. > * I remember the principle way of working of the lamps discussed: > discharges in noble gas emit UV, the UV hits special phosphor on > the glass, the phosphor emits visible light, to get white light a > mix of different phosphor is used, those different phosphors emit > different colours. In an old fashioned (non-electronic ballast) > the phosphor is excited at the mains frequency (50 or 60 times per > second) It is almost certain that the different phosphors for the > different colours do not decade their intensenty in the same > timing. So over a period of 1/50 second the colour might be white, > but if I take a picture with a faster shutter time, the colour > will depend on the excact portion of the 1/50 second that I hit. > > Greetz, Jos > > > > > Christine Aguila wrote: > > LOL! But seriously, this did help clarify matters a bit for me. So, > > thanks. Cheers, Christine > > > > > > ----- Original Message ----- > > From: "Doug Franklin" <[EMAIL PROTECTED]> > > > >> You're asking a two year old to interpret Kafka when you set the camera > >> to AWB. > >> > >> > >> -- > >> Thanks, > >> DougF (KG4LMZ) > >> > >> -- > >> PDML Pentax-Discuss Mail List > >> [email protected] > >> http://pdml.net/mailman/listinfo/pdml_pdml.net > >> to UNSUBSCRIBE from the PDML, please visit the link directly above and > >> follow the directions. > >> > >> > > > > > > > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- Equine Photography www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ Ontario Canada -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
