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You are here: Home / The Last Word / Nikon D4 read noise analysis

Nikon D4 read noise analysis

November 3, 2014 By JimK Leave a Comment

Here are the read noise vs one-dimensional low pass filter size curves for the whole-f-stop ISOs of the Nikon D4. Unfortunately, the D4 chops off the left side of the histogram for dark-field images in its in-camera raw processing:

D4H

D4V

Here they are referred to the sensor:

D4Hsensor

D4Vsensor

You can see that, up until about ISO 800, increasing the in-camera ISO setting helps a lot in reducing read noise. You can also see that there’s something funny going on for the vertical averaging curve at ISO 400.

If the read noise were white and Gaussian, here’s what the sensor-referred curve would look like:

D4ideal

Normalizing the actual sensor-referred curves to the ideal ones results in these plots:

D4Hratio

D4vratio

This is mid-pack low-frequency read noise performance. It looks like skipping ISO 400 might be a good idea.

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