Digital BW, The Print

wrong

foveon has 9 million (+-) image sites that record a 3 MP image, not 9. it is a very wide spread misconception based on sigma * foveon marketing bohoo. yes, this 3 MP image holds more information than comparable 3 MP images from bayer sensors. however the "usefullness" factor is about 1.6 to 1.8 depending on the subject at hand. this has been discussed ad nauseam. so a 3 MP image in the best possible conditions would equal a nikon d100 or canon d60. however it won't even come close to fuji s2 which has a real resolution of approximately 8 - 9 MP although being an effective 6-mio bayer patterned photosite imager


i don't mind foveon canon nikon or fuji for that matter ( personally i still use an olympus E-10 and a contax 645AF with a kodak dcs 645c pro back. but please do not spread rubbish about foveon being a 9 megapixel chip. 

9 megasite chip that records a 3 megapixel image where 3 imagesites are used to record 1 pixel. 

that's it - nothing more nothing less when it comes to resolution.


regards

Veniamin Kostitsin

  ----- Original Message ----- 
  From: Jerry Olson 
  To: DigitalBlackandWhiteThePrint@yahoogroups.com 
  Sent: Wednesday, February 26, 2003 1:27 AM
  Subject: Re: [Digital BW] Re: OT Canon 10D


  Austin, I don't care about arithmetic, numbers or bayer patterns. I only
  can tell you what my eye sees. That's
  good enough for me.  Before I got my D60 camera, many people said it
  couldn't possibly equal film at 12x18 inch film print. I think you were
  among them. Well it can. And I will not get into a debate with you as
  you will only say that's impossible. Sorry, but it is possible and my
  prints prove it to anyone who has seen them.

  And there was no pixelation in the comparison prints I saw. Remember it
  was a comparison between a 9 megapixel chip (foveon) and a 6 megapixel
  chip (Canon). I assume these pictures were upsized with General Fractals
  or some other program like it. I always upsize mine to 240 DPI at ouput
  resolution for photographs. I know you say they couldn't possibly be as
  good, I must lose all kinds of detail when I do this, but I don't.
  Nobody could tell that if they were upsized or not. I'm only speaking of
  12x18 inch prints on 13x19 inch paper here. Not billboards. 

  > > The print comparison I saw was a small center section of
  > > a 30x40 inch image.
  > 
  > That's also questionable, and has me wondering what on earth you were
  > looking at.  Do the arithmetic.  A 3M pixel image is basically 2100 x 1400,
  > let's say.  

  The foveon is effectively NINE megapixles Austin, not  3. The Canon is SIX.

  That would be 1400 pixels of image data over a 30 inch span...or
  > 1400/30 pixels/inch or 46.6 pixels/inch to the printer?  Now come on, Jerry.
  > Do you REALLY believe that a print that has only 46PPI is going to look any
  > good?  It won't, it'll be nothing but pixelation.
  > 
  > They did something to the image, obviously, to get it to look as it did.
  > That isn't the work of the camera, but the work of someone who is proficient
  > in manipulating the image.  IMO, it's dishonest, unless they clearly stated
  > exactly what was done to the original image, and they compared it to an
  > image from a comparable Bayer pattern camera that had the image processed
  > the same (as suitable) way.  Even if they did disclose the workflow, it's
  > still not an honest image comparison of the CAMERA.

  Austin I would never send a 46 DPI image to the printer. and the foveon
  is NINE megapixels. You know this.

  Jerry
  > 
  > Regards,
  > 
  > Austin
  >

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