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[filmscanners] Re: color bit depth and digital cameras


  • To: lexa@lexa.ru
  • Subject: [filmscanners] Re: color bit depth and digital cameras
  • From: "Berry Ives" <yvesberia@earthlink.net>
  • Date: Sat, 14 Jul 2007 06:04:31 -0600
  • Delivery-date: Sat, 14 Jul 2007 13:04:38 +0100
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  • Thread-topic: [filmscanners] Re: color bit depth and digital cameras

Dpreview.com's review indicates that it is a 12-bit raw format.
~Berry


On 7/13/07 11:27 PM, "David J. Littleboy" <davidjl@gol.com> wrote:

>
> From: <ppatton@bgnet.bgsu.edu>
>>>>>>>>>>>>
>
> I was just playing with my new Nikon D200 and discovered
> something that surprised me.  Unless there is some quality
> adjustment setting I missed, it's color bit depth apparently is
> only 8 bits in NEF Raw.  By comparison, my Polaroid SprintScan
> 4000 scanner has a color bit depth of 12 bits, and other scanners
> have much higher color bit depths than this.  While color bit
> depth is a commonly cited specification for scanners, I've seldom
> seen it cited for digital cameras.  Does the lower bit depth for
> the D200 imply lower quality color rendition than my 12 bit scanner?
> <<<<<<<<<<<<<<<<<<<<<<<<<<
>
> I suspect you've done something wrong. This reference
>
> http://www.clarkvision.com/imagedetail/digital.sensor.performance.summary/inde
> x.html
>
> Shows the D200 doing very well indeed at ISO 100. I'm quite sure it uses a
> 12-bit A/D converter.
>
> Note that just because a camera or scanner has X bits in its A/D converter
> doesn't mean you have X bits of valid data in the output files.
>
> David J. Littleboy
> davidjl@gol.com
> Tokyo, Japan
>
>
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