Sigma announces "46 MP" SD-1 DSLR

In article , Bruce
wrote:

Noise tends also to increase colour error (and the Sigma has issues
with that) and smaller pixels increase noise.

Sigma has had a couple of years to develop the sensor and hopefully
iron out that problem.

they can't change the laws of physics.

However, the resolution will be interesting to see.

Indeed. This is the first serious DSLR from Sigma.

it may be more serious than previous attempts but notice they have not
mentioned iso range, frame rate, etc. it's going to be a bit of a joke
if it's limited to iso 1600 and 3 fps like the sd14.

In article , Bruce
wrote:

Noise tends also to increase colour error (and the Sigma has issues
with that) and smaller pixels increase noise.

Sigma has had a couple of years to develop the sensor and hopefully
iron out that problem.

they can't change the laws of physics.

Several years ago, we had people claiming that the Laws of Physics
would prevent a sensor being made with any more than 1.3 MP.

we did? cite links.

Laughably, people even suggested that 1.3 MP was good enough to
replace 35mm film.

who suggested it, and when? cite links.

So please forgive me if I also laugh at your latest, quite ridiculous
pronouncement. ;-)

before you laugh too hard, you might want to verify your so called
facts.

and as for the relationship between noise and pixel size, refer to
roger clark's excellent analysis:

http://www.clarkvision.com/imagedeta...formance.summa
ry/

summary: for a given sensor technology, smaller pixels = more noise.

On Tue, 21 Sep 2010 16:04:40 -0400, nospam wrote:

In article , Bruce
wrote:

Noise tends also to increase colour error (and the Sigma has issues
with that) and smaller pixels increase noise.

Sigma has had a couple of years to develop the sensor and hopefully
iron out that problem.

they can't change the laws of physics.

However, the resolution will be interesting to see.

Indeed. This is the first serious DSLR from Sigma.

it may be more serious than previous attempts but notice they have not
mentioned iso range, frame rate, etc. it's going to be a bit of a joke
if it's limited to iso 1600 and 3 fps like the sd14.

Au contraire, YOU'RE a bit of a joke if you think you need higher ISO and
fast frame rates.

As we still wait, lo these many years, to see even ONE photo from all the
imaginary cameras you have used and own.

LOL!

On Tue, 21 Sep 2010 16:43:09 -0400, nospam wrote:

and as for the relationship between noise and pixel size, refer to
roger clark's excellent analysis:

http://www.clarkspammer.com/imagedet...formance.summa
ry/

summary: for a given sensor technology, smaller pixels = more noise.

Nice of you to cite the one reference that's been completely disproved.
He's just a hopeless spammer at one time that was desperately trying to
justify his DSLR purchases with highly biased misinformation. (To get
people to his site to buy his tourists' snapshots.) I remember when he was
laughed out of the newsgroups when an inexpensive handheld superzoom camera
took clearer images of the moon than his $5,500 of DSLR gear firmly locked
on a heavy tripod with mirror-lockup and cable-release engaged. Damn that
was funny when that happened. LOL!

In article , Bruce
wrote:

and as for the relationship between noise and pixel size, refer to
roger clark's excellent analysis:

http://www.clarkvision.com/imagedeta...formance.summa
ry/

summary: for a given sensor technology, smaller pixels = more noise.

All very well in theory, but it cannot explain why a 12 MP Nikon D3 or
D700 has many times less noise than any 6 MP Nikon DSLR.

yes it very clearly explains why. the d3 has different sensor
technology than the 6mp chips, one which has inherently lower noise.

the key is that sigma is not likely to have advanced the state of the
art as nikon did, and even if they did, foveon will always have a noise
penalty over bayer for several reasons, including the limited well
depth of the thinner layers and the complex math needed to get rgb out
of them.

the sd1 may be a little better than previous sd* cameras but it's not
going to be worlds better and will pale with something like a nikon d3s
or whatever nikon or canon comes out with next. keep in mind that the
sd1 is vaporware and based on sigma's previous announce/ship times, it
will not ship anytime soon. they even say the hoped for date is 'very
tentative.' by the time it actually does ship, a real 30+ mp camera may
exist, one which the sigma fanbois are claiming this matches (which is
delusional but that's what they're saying).

Still, it obviously satisfies people whose interest goes no further
than someone else's theory.

oh, the irony.