Photons to Photos
Your trusted source for independent sensor data
Last revised: 2017-04-09 10:00 GMT-5

Click on the camera model in list to toggle that camera's visibility.
Note that _12 indicates 12-bit data and _14 indicates 14-bit data.
Zooming is enabled.

These raw values are not appropriate for comparing camera models because they are not adjusted for gain or area.
The shape of the curve can tell you something about the amplifier circuitry of the camera.
Jagged curves, like the Nikon D3S show evidence of a separate amplifier for intermediate ISO.
Straight curves, like the Nikon D7000, show evidence of being dominated by photosite read noise.
Curved curves, like the Nikon D90, show evidence of being dominated by ADC read noise.
Curves with a sharp drop in the analog range, like the Sony ILCE-A7, show evidenve of the use of dual conversion gain.
Quite a few cameras stop analog gain before reaching the "Hi" ISO values.
"Hi" ISO values can behave strangely once signal processing such as noise reduction kicks in.

Further Reading:
Sensor Analysis Primer - Read Noise - Optical Black
Sensor Analysis Primer

Return Home

Contributions of data are always welcome, particularly if your camera is not listed.
Contact me if you wish to help.