Pentax K100D vs Pentax K200D: read noise comparison
Input-referred read noise at base ISO: Pentax K100D 15.7 e⁻ (ISO 200), Pentax K200D 9 e⁻ (ISO 100).
Pentax K100D
The Pentax K100D was measured at 5 ISO settings from ISO 200 to ISO 3200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (200) read noise is 2.62 DN, or 15.7 electrons at the sensor. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 23,788 electrons; unity gain is around ISO 1200.
Pentax K200D
The Pentax K200D was measured at 13 ISO settings from ISO 100 to ISO 1600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.
At base ISO (100) read noise is 1.25 DN, or 9 electrons at the sensor. From ISO 500 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 29,659 electrons; unity gain is around ISO 730.
Pentax K100D vs Pentax K200D read noise table
| ISO | Pentax K100D | Pentax K200D |
|---|---|---|
| 100 | – | 1.248 |
| 125 | – | 1.580 |
| 160 | – | 1.753 |
| 200 | 2.621 | 2.250 |
| 250 | – | 2.888 |
| 320 | – | 3.317 |
| 400 | 3.458 | 4.408 |
| 500 | – | 3.138 |
| 640 | – | 4.028 |
| 800 | 6.869 | 5.618 |
| 1000 | – | 6.869 |
| 1250 | – | 8.225 |
| 1600 | 13.454 | 10.853 |
| 3200 | 27.096 | – |
Popular comparisons
- Sony a7 IV vs Nikon Z 6III
- Sony a7 IV vs Canon EOS R6 Mark II
- Nikon Z 6III vs Canon EOS R6 Mark II
- Sony a7 V vs Sony a7 IV
- Sony a7 IV vs Sony a7 III
- Canon EOS R6 Mark III vs Canon EOS R6 Mark II
- Sony a7 V vs Canon EOS R6 Mark III
- Sony a7R V vs Nikon Z 8
- Canon EOS R5 Mark II vs Sony a7R V
- Canon EOS R5 Mark II vs Nikon Z 8
- Canon EOS R5 Mark II vs Canon EOS R5
- Sony a7R V vs Sony a7R IV