more pixels are better!

Started Dec 14, 2008 | Discussions thread
ejmartin Veteran Member • Posts: 6,274
Re: SNR vs exposure

bobn2 wrote:

Graystar wrote:

bobn2 wrote:

That is wrong, there is no evidence supporting the 'DR depends on
pixels size' argument, because it is physically incorrect. What there
is is a lot of anecdotes and poorly framed 'tests'. The physics says
clearly that DR depends on sensor size and efficiency...

Explain why DxO Labs reports that even though the G10 sensor has a
slightly better SNR than the LX3 sensor, the LX3 sensor has one stop
more DR.

Not sure how the question relates at all to what I said, but I'll
answer it anyway. SNR according to DXO, as I understand it, is the
SNR of a 18% grey, exposed as the camera chooses.

Not sure if this is correct. Based on what they are doing, I would think that it's SNR at 18% of raw saturation. They seem rather uninterested in how the camera is metering, and instead simply measuring sensor performance from RAW data.

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