Nikon finally gets the noise down.

Started Nov 17, 2007 | Discussions thread
ejmartin Veteran Member • Posts: 6,274
Similar results

Hi John,

I reported similar results over on the D3 forum:
http://forums.dpreview.com/forums/read.asp?forum=1021&message=25658562
using essentially the same methodology.

I find roughly the same QE for the D3 that you did, within measurement uncertainties. My take on the result is a bit different, though. Similar (and more accurate) measurements on the Canon 1Dmk3 yielded about 39,500 electrons at raw saturation at ISO 200, compared to the 53,400 that I found for the D3 at that ISO. This discrepancy is purely attributable to the ratio of sensel areas -- the pixel pitch of the 1Dmk3 is 7.2 microns, compared to the 8.46 microns of the D3. Thus I would say that Canon and Nikon have sensors of comparable efficiency in these two cameras, and have simply made different choices for sensor and sensel sizes. Their light collection efficiency is the same per unit area of sensor.

Also at the ISO's I have measured, the read noises of the two cameras are rather comparable to one another.
--
emil
--

http://theory.uchicago.edu/~ejm/pix/20d/

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