Caucasian skin tones are apparently a problem for Bayer Matrix sensors because they are within the frequency response curves for both green and red sensor sites, which tends to give an additional red cast to caucasian skin. This can be corrected in post fairly easily if you shoot RAW of course.
-Adam Who was just reading about this in a rather good book about photographing and post-processing people shots, a book called Skin by Lee Varis. And no, it's not about nudes. Tim Øsleby wrote: > I've noticed this with my DS too. It is a real PITA in difficult light (read > concert shooting). If I don't have time to do proper spot metering I tend to > end up with reddish skin cast that is impossible to get rid of in > processing. I've blown a few gigs doing this. > > > Tim > Mostly harmless (just plain Norwegian) > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jens > Bladt > Sent: 11. februar 2007 16:14 > To: Pentax-Discuss Mail List > Subject: RE: Better K10D exposure-tests (Was:*ist-Ds Vs. K10D image > quality?) > > PPS: > I have added a little test to my Flickr pages as well: > http://www.flickr.com/photos/bladt/sets/72157594529582033/ > > Regards > > Jens Bladt > Nytarkort / Greeting Card: > http://www.jensbladt.dk/godtnytaar2007/lydshow.html > > http://www.jensbladt.dk > +45 56 63 77 11 > +45 23 43 85 77 > Skype: jensbladt248 > > -----Oprindelig meddelelse----- > Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] vegne af Jens > Bladt > Sendt: 11. februar 2007 13:36 > Til: Pentax-Discuss Mail List > Emne: Better K10D exposure-tests (Was:*ist-Ds Vs. K10D image quality?) > > > William, PauI, Godfrey, Rob, Peter, David, John ... > > I don't know what the .... went wrong yesterday, testing exposure of the > K10D. > Perhaps the FA* 2.8/80-200mm is not working right with the K10D? > Perhaps changing leses many times, metering by manually by Green Button etc. > did confuse the cameras or me, or the light perhaps changed betewwn > switching camera bodies ? I have no idea. > > Anyway, today I did some new test shots - comparing the K10D and the *ist D, > using two samples of the same Pentax lens: > The old SMC Pentax-F 4-5.6 35-80mm. > > So, I put one of these lenses on both cameras and did a few test shots. I > shot the same scenery twice -using the same shutterspeed, same settings > (multi-segnment, WB, contrast, sharpness, saturation, ISO 200, RAW). > > And guess what? The results are quite surpirsing. > It seems to me that the K10D in fact does a better job, dealing with > contrast. > The K10D shots are consistantly the most pleasing shots, despite of the dark > scenery/bright sky. Such conditions are very common in our (northern) parts > of the world (low sun). Very often our contrasty environment requires manual > exposure corrections. It seems the K10D handeled the situation quite well. > Much better than the *ist D. > I am pleasantly surprised! > > Judge for your selves. What do you think? > > http://www.jensbladt.dk/Test/K10D-vs-istD/K10D-test-album.html > > Thanks for looking - comments area welcome. > > Jens Bladt > Nytarkort / Greeting Card: > http://www.jensbladt.dk/godtnytaar2007/lydshow.html > > http://www.jensbladt.dk > +45 56 63 77 11 > +45 23 43 85 77 > Skype: jensbladt248 > > -----Oprindelig meddelelse----- > Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] vegne af Jens > Bladt > Sendt: 11. februar 2007 01:03 > Til: Pentax-Discuss Mail List > Emne: RE: *ist-Ds Vs. K10D image quality? > > > Nooooo > I've done this right a 1000 times. And the strategy for a (too) bright sky > sky IS the same as for a backlit scenry. > And - so why does the *ist D do the exact scenery right (not over > compensating)? > Regards > Jens Bladt > Nytarkort / Greeting Card: > http://www.jensbladt.dk/godtnytaar2007/lydshow.html > > http://www.jensbladt.dk > +45 56 63 77 11 > +45 23 43 85 77 > Skype: jensbladt248 > > -----Oprindelig meddelelse----- > Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] vegne af William > Robb > Sendt: 10. februar 2007 19:55 > Til: Pentax-Discuss Mail List > Emne: Re: *ist-Ds Vs. K10D image quality? > > > > ----- Original Message ----- > From: "Jens Bladt" > Subject: RE: *ist-Ds Vs. K10D image quality? > > > >> Regarding exposure, I'll do som emore test tomorrow, evenly lit scenes >> (walls, grey card etc.) as well ad contraty ones, im order tio figure out >> if >> the meter is off or if the matrix metering is over reacting. Surely I >> can't >> live with this. >> >> When photographing a a scenery with a very bright sky (very common in the >> northern parts og the world) I must dial in MINUS CORRECTION, when using >> the >> K10D. This is the exact opposite of what I have done for the last 30 >> years! >> I could never get used to this. My K10D requires reversed backlight >> compensation. Surely that can't be right! >> > > It soulds to me like the metering is compensating the sky as if it was a > backlit scene (overexposing to ensure sufficient exposure to the subject). > This is what we call subject failure in the industry. > I think you will find the meter is behaving normally, and that you will need > to adjust your metering strategy for this scene type. > > William Robb > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.441 / Virus Database: 268.17.33/678 - Release Date: 02/09/2007 > 16:06 > > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.441 / Virus Database: 268.17.33/678 - Release Date: 02/09/2007 > 16:06 > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.441 / Virus Database: 268.17.33/678 - Release Date: 02/09/2007 > 16:06 > > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.441 / Virus Database: 268.17.35/680 - Release Date: 02/10/2007 > 21:15 > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.441 / Virus Database: 268.17.35/680 - Release Date: 02/10/2007 > 21:15 > > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.441 / Virus Database: 268.17.35/680 - Release Date: 02/10/2007 > 21:15 > > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
