Nikon D3500 vs Nikon D3X: read noise comparison

Input-referred read noise at base ISO: Nikon D3500 3.8 e⁻ (ISO 100), Nikon D3X 5.9 e⁻ (ISO 100).

Nikon D3500

The Nikon D3500 was measured at 9 ISO settings from ISO 100 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 0.45 DN, or 3.8 electrons at the sensor. From ISO 800 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 12800 don't change analog gain (digital push). Full well at base ISO is about 33,019 electrons; unity gain is around ISO 830.

Nikon D3X

The Nikon D3X was measured at 20 ISO settings from ISO 50 to ISO 6400. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 2.06 DN, or 5.9 electrons at the sensor. From ISO 200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 1600 don't change analog gain (digital push). Full well at base ISO is about 46,773 electrons; unity gain is around ISO 280.

Nikon D3500 vs Nikon D3X read noise table

ISO	Nikon D3500	Nikon D3X
50	–	2.056
64	–	2.056
80	–	2.056
100	0.454	2.056
125	–	2.770
160	–	3.458
200	0.807	2.828
250	–	3.555
320	–	4.724
400	1.292	5.979
500	–	7.111
640	–	8.877
800	2.282	11.236
1000	–	13.929
1250	–	17.509
1600	4.199	21.706
2000	–	27.096
2500	–	34.060
3200	8.112	42.814
6400	15.455	86.823
12800	31.341	–
25600	59.714	–

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