Canon EOS 250D vs Canon EOS 30D: read noise comparison

Input-referred read noise at base ISO: Canon EOS 250D 7.1 e⁻ (ISO 100), Canon EOS 30D 21.6 e⁻ (ISO 100).

Canon EOS 250D

The Canon EOS 250D was measured at 10 ISO settings from ISO 100 to ISO 51200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 3.29 DN, or 7.1 electrons at the sensor. From ISO 6400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 34,103 electrons; unity gain is around ISO 210.

Canon EOS 30D

The Canon EOS 30D was measured at 14 ISO settings from ISO 100 to ISO 3200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 1.77 DN, or 21.6 electrons at the sensor. From ISO 1250 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 48,396 electrons; unity gain is around ISO 1220.

Canon EOS 250D vs Canon EOS 30D read noise table

ISO	Canon EOS 250D	Canon EOS 30D
100	3.294	1.765
125	–	2.297
160	–	1.558
200	4.408	1.853
250	–	2.428
320	–	1.717
400	5.816	2.114
500	–	2.751
640	–	2.219
800	11.551	2.828
1000	–	3.681
1250	–	3.340
1600	20.112	4.408
3200	35.017	8.815
6400	60.129	–
12800	114.563	–
25600	225.972	–
51200	407.315	–

Popular comparisons

All cameras · Open the full tool