TREN
FujiFilm X-T5 (ES) read noise vs ISO
The FujiFilm X-T5 (ES) was measured at 21 ISO settings from ISO 125 to ISO 12800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (125) read noise is 2.73 DN. From ISO 1600 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.
FujiFilm X-T5 (ES) read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 125 | 2.732 | 1.45 |
| 160 | 3.160 | 1.66 |
| 200 | 3.681 | 1.88 |
| 250 | 4.347 | 2.12 |
| 320 | 5.169 | 2.37 |
| 400 | 6.233 | 2.64 |
| 500 | 4.408 | 2.14 |
| 640 | 5.205 | 2.38 |
| 800 | 6.277 | 2.65 |
| 1000 | 7.727 | 2.95 |
| 1250 | 9.318 | 3.22 |
| 1600 | 11.472 | 3.52 |
| 2000 | 14.123 | 3.82 |
| 2500 | 17.148 | 4.10 |
| 3200 | 21.407 | 4.42 |
| 4000 | 27.284 | 4.77 |
| 5000 | 34.060 | 5.09 |
| 6400 | 43.111 | 5.43 |
| 8000 | 53.076 | 5.73 |
| 10000 | 67.649 | 6.08 |
| 12800 | 78.249 | 6.29 |