How does the D3 achieve such high ISO?

Started Feb 17, 2008 | Discussions thread
John Sheehy Forum Pro • Posts: 25,211
Re: Nikon is the best in noise reduction. YES!

gingerbaker wrote:

TheVoIP is on to the crux of the matter, I think.

It ain't just a slightly larger sensor, or pixils, or microlenses.

Nikon is now using a CMOS sensor yet the camera produces virtually no
chrominance noise. Pretty much like their efforts with their CCD
sensors.

The balance between luminance and chrominance noise has nothing to do with the sensor, unless a sensor has high levels of low-frequency noise, and that is generally not the case in expensive cameras, whose noise is generally concentrated near the nyquist.

The demosaicing algorithm used, and any subsequent software PP is the only thing that makes noise lean towards luminance or chrominance in these cameras.

Nikon RAWs, converted with generic processing, have plenty of chroma noise:

http://www.pbase.com/jps_photo/image/86735542/original

That's a 100% crop of the embedded JPEG from a D2X RAW on the left, and a simple conversion of the RAW on the right, with no sharpening or noise reduction.

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John

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