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You are here: Home / The Last Word / Nikon D5 — absence of high-ISO spatial filtering

Nikon D5 — absence of high-ISO spatial filtering

April 3, 2016 JimK 1 Comment

This is part of a series of posts about the Nikon D5. The series starts here.

There are some places in the read noise vs ISO curves for the D5 wither there are suspicious-looking kinks. From previous work, I know that Sony does spatial filtering at high ISOs on some of their a7x cameras, with an eye towards reducing shadow noise.

Does the D5 do something similar?

I did a series of frequency analyses of some of the dark field images.

ISO 100 FFT

fs is the sampling frequency. These are all for the red raw plane of a 1000×1000 pixel central crop.

ISO 200 FFT

ISO 400 FFT

ISO 640 FFT

ISO 1250 FFT

ISO 2500 FFT

ISO 5000 FFT

ISO 10000 FFT

ISO 25600 FFT

ISO 102400 FFT

These are all quite flat, except for a hint of low frequency noise in some. Looks like Nikon isn’t resorting to spatial filtering trickery.

The Last Word

← Nikon D5 — ultra-high ISO push processing Nikon D5 — EFCS operation →

Comments

  1. Jack Hogan says

    April 3, 2016 at 11:25 pm

    Excellent, good for Nikon.

    Reply

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