B&H Photo gets it right - Sigma SD10 is 13.72MP

Discussion in 'Digital Photography' started by Georgette Preddy, Jun 6, 2004.

  1. Georgette Preddy

    tekfull Guest

    Lets see your pics.


     
    tekfull, Jun 7, 2004
    #21
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  2. The Foveon sensor has 10.2 million sensors, but 3.4 megapixels of spatial
    resolution. If the 10.2 million sensors meant that the 3.4 megapixels had
    better color resolution then Foveon would have at least been able to compete
    in the low-resolution market; alas a 6 megapixel Bayer sensor has better
    resolution AND more accurate color. This is why no first or second tier
    manufacturers went the X3 route.
     
    Steven M. Scharf, Jun 7, 2004
    #22
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  3. Georgette Preddy

    PTRAVEL Guest

    I don't necessarily disagree, particularly since a Bayer sensor will have
    far better color discrimination than the Foveon (as born out by the articles
    cited by Preddy).

    The point, though, is that a 6.3 M Bayer delivers 6.3 megapixels of
    luminance and optical resolution, whereas as a "10.3 M" Foveon only delivers
    3.4 megapixels of luminance and optical resolution.
     
    PTRAVEL, Jun 7, 2004
    #23
  4. Georgette Preddy

    PTRAVEL Guest

    I agree. I was merely correcting yet another of Preddy's lies, vis-a-vis
    what B&H _actually_ says about the Foveon.
     
    PTRAVEL, Jun 7, 2004
    #24
  5. Georgette Preddy

    Skip M Guest

    --
    Skip Middleton
    http://www.shadowcatcherimagery.com
    This from their website:
    Sigma Sigma SD10, 3.4 Megapixel, Interchangeable Lens, SLR, Digital Camera
    with Sigma 18-50mm & 55-200mm Lenses (Foveon X3 Pro CMOS Sensor: 3.4M Red +
    3.4M Green + 3.4M Blue = 10.2 Megapixel Total Resolution)
    Obviously copied from Sigma PR.
     
    Skip M, Jun 7, 2004
    #25
  6. You better be careful posting stuff like that, Bayer users here say
    all that matters is how much interpolation inflates the recorded MP
    count, without regard for the optical resolution carried within those
    pixels.

    Foveon is optically perfect in this respect, in that every output
    pixel carries 100% real and discrete full color information. Anything
    less is not a photograph, just a digital interpolation or guess.
     
    Georgette Preddy, Jun 7, 2004
    #26
  7. But not by B&H, who clearly get it.
     
    Georgette Preddy, Jun 7, 2004
    #27
  8. 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, Jun 7, 2004
    #28
  9. 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, Jun 7, 2004
    #29
  10. Good job B&H!
     
    Georgette Preddy, Jun 7, 2004
    #30
  11. Good job B&H!
     
    Georgette Preddy, Jun 7, 2004
    #31
  12. 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, Jun 7, 2004
    #32
  13. They do say that, but their description is still not accurate:

    Is:

    "Sigma SD10, 3.4 Megapixel, Interchangeable Lens, SLR, Digital Camera
    (Foveon X3 Pro CMOS Sensor: 3.4M Red + 3.4M Green + 3.4M Blue = 10.2
    Megapixel Total Resolution)"

    Should be:

    "Sigma SD10, 3.4 Megapixel, Interchangeable Lens, SLR, Digital Camera
    (Foveon X3 Pro CMOS Sensor: 3.4M Red + 3.4M Green + 3.4M Blue = 10.2
    Megasensor, with 3.4 Mpixel Resolution)"

    There is no such thing as "Total Resolution." They put "Total" in there
    because omitting it would imply that it was spatial resolution.

    If they want to be honest, they would have to say 10.2 Megasensor, rather
    than 10.2 Megapixel, and state the correct resolution, without the modifier
    of "Total." Perhaps they are trying to unload their stock of SD10's since
    they aren't selling well.

    But don't blame B&H completely. Remember that at least for the paper
    catalogs, the manufacturer pays B&H for the catalog space, B&H could not
    afford to send out those huge catalogs without the cooperative advertising
    money. So Sigma can put whatever they want in their ad. The manufacturer may
    also pay for web advertising. Maybe Henry can clarify all this.
     
    Steven M. Scharf, Jun 7, 2004
    #33
  14. Georgette Preddy

    tekfull Guest

    Lets see the pics.
     
    tekfull, Jun 7, 2004
    #34
  15. Georgette Preddy

    Crownfield Guest

    actually no,
    again.

    you are a slow learner.
    there are only 2500 x 1500 pixel locations in a foveon sensor.
    you can only record 3 mp.

    you can interpolate and calculate and upsize,
    and then you can have 10, 20, 40, 80mp and even imagine 200mp.

    but there was only data for 3 mp to start with.
     
    Crownfield, Jun 7, 2004
    #35
  16. (Georgette Preddy) wrote in

    Sigma outputs RAW. And this RAW picture is taken from
    3.4 million positions, a.k.a. pixels.

    The Sigma software on your computer can take this RAW
    picture and convert it to 14 Mpixels.


    /Roland
     
    Roland Karlsson, Jun 7, 2004
    #36
  17. Georgette Preddy

    Bill Funk Guest

    Well, sure it does,
    So do Bayer sensors.
    I understasnd the English language pretty well.
    Less that what, exactly?
    Given that both Sigma SD9/10 cameras, and all other DSLRs, output
    pixels that carry "100% real and discrete full color information",
    that means that DSLRs that output only images with nothing other than
    grayscale images aren't Pro cameras. But how many of those are there?
     
    Bill Funk, Jun 8, 2004
    #37
  18. Georgette Preddy

    Crownfield Guest

    and just as perfectly, to 256 mp.

    but in both cases,
    there is only 2500 x 1500 pixels of data. a tiny 3 mp.
     
    Crownfield, Jun 8, 2004
    #38
  19. You obviously don't understand what you're talking about. Bayer CFS sensors
    are not monochrome. They sense (approximately) 1/3rd spectrum per pixel.
    Monochrome is something totally(!) different.

    Bart
     
    Bart van der Wolf, Jun 8, 2004
    #39
  20. Correct, with particular emphasis on luminance! Even, or should I say of
    course, the ISO organization, only talks about pixels when referring to
    output/luminance pixels. In ALL other case they talk about sensors (=input).

    Bart
     
    Bart van der Wolf, Jun 8, 2004
    #40
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