TREN
Sigma fp (CL) read noise vs ISO
The Sigma fp (CL) was measured at 12 ISO settings from ISO 6 to ISO 80. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
Sigma fp (CL) read noise table
| ISO | Read noise (DN) | log₂ |
|---|---|---|
| 6 | ○ 0.582 | -0.78 |
| 8 | ○ 0.707 | -0.50 |
| 10 | ○ 0.570 | -0.81 |
| 12 | ○ 0.801 | -0.32 |
| 16 | ○ 0.835 | -0.26 |
| 20 | ○ 0.973 | -0.04 |
| 25 | ○ 1.173 | 0.23 |
| 32 | ○ 1.231 | 0.30 |
| 40 | ○ 1.173 | 0.23 |
| 50 | ○ 1.625 | 0.70 |
| 64 | ○ 1.625 | 0.70 |
| 80 | ○ 1.625 | 0.70 |