ISOless sensors, read noise and photography - many questions!

Started Oct 3, 2013 | Discussions thread
EinsteinsGhost
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Re: example of convenient 4-stop "push" acceptable to many
In reply to RussellInCincinnati, Oct 4, 2013

Russell,

These images are not a good candidate to see banding since you're not really lifting any shadows but it is still influencing patterns (most visible in darker areas, around nose, for example). If there is any point to pushing in post, it is to be had if DR is an issue. You're not gaining on noise. In fact, 12,800 appears to have a slight edge.

Here're a couple from NEX-3:

50mm, f/2, 1/320s, ISO 12,800

50mm, f/2, 1/320s, ISO 800, +4EV

Banding starts to show in the left side of the frame (and there is also more chroma noise on the dark patterns themselves, which is also due to banding). And that is without having to lift the shadows completely (which begins to show distinct lines). Here is the original ISO 800:

RussellInCincinnati wrote:

For example, I find a "four stop push" from ISO 800 to 12800, Nex C3 raw files acceptable. I particularly see not the slightest hint of banding.

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