"3MP" Showdown
 

3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original

[OT] [GP] "3MP" Showdown
 

George Preddy wrote:

3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original
{please note}

The person posting under the name of George or Georgette Preddy (and
other pseudonyms) has an ungrounded but zealous faith that current
implementation of the Foveon chip is superior to all other chip
technologies. He will cite portions of reviews to ostensibly support his
claims, and will repeat, ad naseum, complete lines of out-of-context
material.

His claims may well be ignored, or at the very least verified since most
of them are extreme distortions and some are out and out fabrications."

Moreover, "Mr." "Preddy" has claimed to be a photographer (pro!), but
cannot bring himself to post a single picture with EXIF info that he
shot himself, in spite of repeated requests and challenges to do so.

Apparently he loathes anything related to Canon and loves everything
about Sigma cameras and lenses. His "claims" may be ignored, and he is
doing Sigma, and anyone related to the Foveon chip, no good at all by
arousing ire, increasing the N/S ratio, and generally spamming this
newsgroup.

--
John McWilliams

"3MP" Showdown
 

"George Preddy" wrote in message
om...
3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original

Yup, you proved that the Sigma takes a significantly better photo than a
compact P&S that (in Australia at least) costs 1/6th the price of the Sigma.
I notice that there is no exif info for the Sigma - what ISO? what exposure
settings? The only way to make a proper comparison is if both cameras take a
photo of the same subject in the same lighting. Considering I've seen much
better quality photos than that out of 3MP P&S's I'm dubious about how
accurate the ISO settings etc are with the Sony.
Considering the Sigma has a larger sensor size and better lens than the
DSCP72, and costs several times its price, it's to be expected that it will
always take a better photo in the same conditions - irrespective of whether
it is a Foveon or a Bayer sensor. This is just the same as how a cheap film
SLR will usually take a better photo than a film P&S, even with the same
film.

"3MP" Showdown
 

John McWilliams wrote in message news:fq_Fc.24529$Oq2.19544@attbi_s52...
George Preddy wrote:

3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original
{please note}

The person posting under the name of George

Seems like you are at a loss to explain the mega dominance of Sigma in this market.

"3MP" Showdown
 

"George Preddy" wrote in message
m...
John McWilliams wrote in message
news:fq_Fc.24529$Oq2.19544@attbi_s52...
George Preddy wrote:

3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original
{please note}

The person posting under the name of George

Seems like you are at a loss to explain the mega dominance of Sigma in
this market.

Steve, you are wrong, again, as usual. Sigma does not dominate this market.

Bart

"3MP" Showdown
 

"George Preddy" wrote in message
om...
"Bart van der Wolf" wrote in message
...
"George Preddy" wrote in message
m...
John McWilliams wrote in message
news:fq_Fc.24529$Oq2.19544@attbi_s52...
George Preddy wrote:

3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original
{please note}

The person posting under the name of George

Seems like you are at a loss to explain the mega dominance of Sigma in
this market.

Steve, you are wrong, again, as usual. Sigma does not dominate this
market.

Sandy, in terms of quality Sigma is dominant right now,

Steve Giovenella, don't change the subject. You said "dominance in this
market", now you change your tune to "in terms of quality". It is still a
pathetic lie.

Bart

"3MP" Showdown
 

George Preddy wrote:

John McWilliams wrote in message news:fq_Fc.24529$Oq2.19544@attbi_s52...
George Preddy wrote:

3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original
{please note}

The person posting under the name of George

Seems like you are at a loss to explain the mega dominance of Sigma in this market.

you misspelled insignificance ...

"3MP" Showdown
 

George Preddy wrote:

"Bart van der Wolf" wrote in message ...
"George Preddy" wrote in message
m...
John McWilliams wrote in message
news:fq_Fc.24529$Oq2.19544@attbi_s52...
George Preddy wrote:

3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original
{please note}

The person posting under the name of George

Seems like you are at a loss to explain the mega dominance of Sigma in
this market.

Steve, you are wrong, again, as usual. Sigma does not dominate this market.

Sandy, in terms of quality Sigma is dominant right now, no other pro
DSLR is even close. Certainly not the ancient 1Ds, with its barebones
electronic side, small sensor pitch, and blurry old 90's vintage 0.35
micron CMOS. Certainly not the moire-machine 14n. Not only is Sigma
dominant, there's literally no competition in the pro class.

Sigma is outclassing medium format film, no one else is halfway to
35mm in full color performance.

and canon and nikon outsell sigma to the pros by 10,000 to 0.

sigma could disappear tonight,
and none of the pros would notice.

"3MP" Showdown
 

"Bart van der Wolf" wrote in message
...

"George Preddy" wrote in message
m...
John McWilliams wrote in message
news:fq_Fc.24529$Oq2.19544@attbi_s52...
George Preddy wrote:

3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original
{please note}

The person posting under the name of George

Seems like you are at a loss to explain the mega dominance of Sigma in
this market.

Steve, you are wrong, again, as usual. Sigma does not dominate this
market.

Bart


Sigma doesn't dominate *any* market.

Mark

"3MP" Showdown
 

Justin Thyme wrote:
"George Preddy" wrote in message
om...

3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original

3MP Foveon image (13.72 Bayer MPs)
http://www.pbase.com/image/23256593/original


Yup, you proved that the Sigma takes a significantly better photo than a
compact P&S that (in Australia at least) costs 1/6th the price of the Sigma.

What it shows is that a small-sensor digicam will produce results which
are dominated by noise if you run it at high iso. The image at:

http://www.pbase.com/image/30968764/original

was taken with a similarly cheap compact P&S. It's by no means a
technically flawless shot but it's in a different league to the
Sony picture George referenced.

The picture of the SD9 contains a useful illustration of why blur
filters should be used even when sampling with full colour at each
location. Simply view the picture at 50% with an application that
does not do proper antialiasing for generating such a view (eg GIMP) -
artifacts are very visible in the filter threads. Similarly my
own picture shows a mess of artifacts at 25%

- Len

"3MP" Showdown
 

"Mark B." wrote:

Sigma doesn't dominate *any* market.

They dominate the market for cameras and lenses that use the Sigma lens
mount. grin

--
Mark Roberts
Photography and writing
www.robertstech.com

"3MP" Showdown
 

In article , George
Preddy wrote:

Sandy, in terms of quality Sigma is dominant right now, no other pro
DSLR is even close. Certainly not the ancient 1Ds, with its barebones
electronic side, small sensor pitch, and blurry old 90's vintage 0.35
micron CMOS. Certainly not the moire-machine 14n. Not only is Sigma
dominant, there's literally no competition in the pro class.

Sigma is outclassing medium format film, no one else is halfway to
35mm in full color performance.

The only thing dominant about Sigma is their ability to produce
mediocre equipment which create mediocre images.

"3MP" Showdown
 

Mark Roberts wrote in news:y7kGc.23358$MT5.2373
@nwrdny01.gnilink.net:

Sigma doesn't dominate *any* market.

They dominate the market for cameras and lenses that use the Sigma lens
mount. grin


They also dominate the market using Foveon sensors.


/Roland

"3MP" Showdown
 

Leonard wrote:

http://www.pbase.com/image/30968764/original

correction:

http://www.pbase.com/image/31010266/original

I redid the rotation and crop down to 3MP with jpegtran (lossless) so as
to show more closely the actual camera output. The main difference is the
file size is quite a bit smaller.

- Len

"3MP" Showdown
 

Leonard writes:

The picture of the SD9 contains a useful illustration of why blur
filters should be used even when sampling with full colour at each
location.

An antialiasing filter shouldn't be called a "blur filter" because it
doesn't simply blur the image. The ones made from birefringent material
create a controlled multiple image that eliminates information at the
Nyquist frequency while maintaining good contrast up to about 70% of
that limit. A filter that simply blurred a point into a round disc
or a Gaussian shape would lose much more image information below the
Nyquist limit if it was sized to produce reasonable attenuation at the
Nyquist frequency. In filtering terms, the anti-aliasing filter
provides a sharper cutoff than any simply blurring filter.

Foveon's technical reports call an antialiasing filter a "blur filter"
because they don't want to understand the difference, and don't
acknowledge that avoiding aliasing is a good thing. "George" calls it
that too, probably for the same reason. And you *can* use blur to
provide anti-aliasing, it just isn't what cameras with AA filters do.

Dave

"3MP" Showdown
 

"George Preddy" wrote in message
om...
3MP Bayer image (0.75 Foveon MPs)
http://www.pbase.com/image/30338213/original


Only a moron (if the shoe fits, Preddy...) would try to pass this off as a
typical 3MP bayer image. My 3 year-old Oly C-3040 takes incredible
pictures. This one looks like it was taken at about ASA/ISO 1600 with very,
very little light and a super-long exposure.

Foveon is interesting technology but it's low light performance leaves much
to be desired, which is only one reason why www.dpreview.com could only give
either Sigma DSLR a "Recommended" rating instead of the coveted "Highly
Recommended" like the D70, Digital Rebel, and Pentax *ist D all received
(and even the Oly 8080, the successor to my C-3040).