Sigma/Foveon Questions
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From: Ray Fischer on 25 Apr 2010 03:17 David J Taylor <david-taylor(a)blueyonder.co.uk> wrote: >> however, the total number doesn't change. there are 12 million on the >> sensor and 12 million in the image, or however many the sensor has. > >There are 12 million monochrome pixels on the sensor, No, there are 4.6 million pixels. Any other claim is a lie. > interpolated to 12 >million colour pixels. The sensor only has 3 million red pixels, but Learn what "pixel" means. -- Ray Fischer rfischer(a)sonic.net
From: Alfred Molon on 25 Apr 2010 03:35 In article <240420101624416052%nospam(a)nospam.invalid>, nospam says... > > 2/3 of the needed colour information is missing in a Bayer sensor, and > > that has an impact on the effective resolution. > > a small impact. 2/3 of the data are missing, but the impact is small? I'm not so sure... -- Alfred Molon ------------------------------ Olympus E-series DSLRs and micro 4/3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site
From: Alfred Molon on 25 Apr 2010 03:38 In article <240420101627135181%nospam(a)nospam.invalid>, nospam says... > do you have a d3 sensor without live view to compare with one that has > live view? no? then how do you know that it does not impact anything? As I wrote, would Nikon do anything which would compromise high ISO performance in the D3 cameras? That would not make sense. -- Alfred Molon ------------------------------ Olympus E-series DSLRs and micro 4/3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site
From: nospam on 25 Apr 2010 03:53 In article <MPG.263e0f2f69b19af98c2af(a)news.supernews.com>, Alfred Molon <alfred_molon(a)yahoo.com> wrote: > In article <240420101624416052%nospam(a)nospam.invalid>, nospam says... > > > > 2/3 of the needed colour information is missing in a Bayer sensor, and > > > that has an impact on the effective resolution. > > > > a small impact. > > 2/3 of the data are missing, but the impact is small? I'm not so sure... the chroma resolution is lower, which humans can't see. the impact to luminance resolution is very small.
From: David J Taylor on 25 Apr 2010 04:19
"nospam" <nospam(a)nospam.invalid> wrote in message news:250420100053486064%nospam(a)nospam.invalid... > In article <MPG.263e0f2f69b19af98c2af(a)news.supernews.com>, Alfred Molon > <alfred_molon(a)yahoo.com> wrote: > >> In article <240420101624416052%nospam(a)nospam.invalid>, nospam says... >> >> > > 2/3 of the needed colour information is missing in a Bayer sensor, >> > > and >> > > that has an impact on the effective resolution. >> > >> > a small impact. >> >> 2/3 of the data are missing, but the impact is small? I'm not so >> sure... > > the chroma resolution is lower, which humans can't see. the impact to > luminance resolution is very small. Indeed. It's a clever engineering compromise, and for some people a better compromise than the lower sensitivity and poorer colour accuracy they find in the current implementation of Foveon. David |