Nikon D5300 vs Nikon D5500: read noise comparison

Input-referred read noise at base ISO: Nikon D5300 3.3 e⁻ (ISO 100), Nikon D5500 3.2 e⁻ (ISO 100).

Nikon D5300

The Nikon D5300 was measured at 25 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 1.58 DN, or 3.3 electrons at the sensor. From ISO 500 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 8000 don't change analog gain (digital push). Full well at base ISO is about 33,241 electrons; unity gain is around ISO 210.

Nikon D5500

The Nikon D5500 was measured at 25 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 1.49 DN, or 3.2 electrons at the sensor. From ISO 500 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 2500 don't change analog gain (digital push). Full well at base ISO is about 34,087 electrons; unity gain is around ISO 220.

Nikon D5300 vs Nikon D5500 read noise table

ISO	Nikon D5300	Nikon D5500
100	1.580	1.495
125	1.741	1.765
160	2.099	2.144
200	2.585	2.603
250	3.138	3.095
320	3.758	3.837
400	4.595	4.627
500	5.579	5.657
640	6.869	6.869
800	8.398	8.456
1000	10.411	10.267
1250	12.996	12.553
1600	15.562	16.000
2000	19.427	19.562
2500	24.251	24.251
3200	30.484	30.484
4000	38.586	38.586
5000	48.503	48.503
6400	60.548	60.548
8000	76.109	76.109
10000	97.006	94.353
12800	121.095	123.640
16000	147.033	151.167
20000	182.278	190.019
25600	230.720	247.280

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