Dave Scott wrote:
> The only digital SLR that I am aware of from Sigma is the SD9 which is 3.2
> MP. NEVER heard anyone claim it to be 10 MP.
> "Geir Magne Lauritzen" <[email protected]> wrote in message
Sigma claims 10.2MP in their ads. The reason is that they use the
Foveon X3 sensor that records all three colors in every pixel.
Bob
You would hope that with a statement like this they'd go for a little
substance...
Guess the troll is out from under the bridge?
"Bandicoot" <[email protected]> wrote in message
news:[email protected]...
> Sigma makes 3MP DSLR bodies and calls them 10MP. They render color all
wrong.
The only digital SLR that I am aware of from Sigma is the SD9 which is 3.2
MP. NEVER heard anyone claim it to be 10 MP.
"Geir Magne Lauritzen" <[email protected]> wrote in message
news:[email protected]...
> Bullshit
>
> G M L
>
> "Bandicoot" <[email protected]> skrev i melding
> news:[email protected]...
> > Sigma makes 3MP DSLR bodies and calls them 10MP. They render color all
> wrong.
>
>
Bullshit
G M L
"Bandicoot" <[email protected]> skrev i melding
news:[email protected]...
> Sigma makes 3MP DSLR bodies and calls them 10MP. They render color all
wrong.
Just like film it's all about the grain.
Digital cameras use something called a ccd to pick up picture information.
ccds use a form of photovoltaic cells tuned to receive light at a specific
wavelength.
now that's all fine and good except that light penetrates materials to
different depths because of the photon's wavelength.
in traditional ccds the chip (ccd) is flat and will group cells together in
arrangements [R][G][B] OR [B][R][G] since the pixels are next to each other
if you zoom in to your picture at 1600% or so you can see these groupings.
what the foveon chip does is take advantage of the depth differential and
packs the individual cells in line so that the light that comes in which
might be a combination of any of the rgb colors is detected filtered and
passed on to the layer underneath it. thus allowing a discreet color pattern
to emerge, in the same way a film negative or positive appears.
this technique results in a cleaner image which is free of abberations and
color distortions that normally plague traditional (Packed Pixel) ccds.
I also spoke to a Sigma Engineer who worked on the camera, who said that the
CCD is shielded and moved away from amplifiers and transformers that may
introduce stray noise into the image.
This is particualrly useful when making long exposures. the Engineer stated
that they have done 30 minute to one hour exposures with none of the noise
that the 'other brands' suffer from.
The 3.2 mp image is also stored in raw format, the camera does no image
processing so that you will always have the highest possible image quality.
J
"Bob Sull" <[email protected]> wrote in message
news:[email protected]...
> Dave Scott wrote:
>
> > The only digital SLR that I am aware of from Sigma is the SD9 which is
3.2
> > MP. NEVER heard anyone claim it to be 10 MP.
> > "Geir Magne Lauritzen" <[email protected]> wrote in message
>
> Sigma claims 10.2MP in their ads. The reason is that they use the
> Foveon X3 sensor that records all three colors in every pixel.
>
> Bob
>
>