Dynamic Range of a Digital Sensor
Posted: Fri Apr 25, 2014 1:06 pm
I am using this post as a collection of information on the dynamic range (DR) of a digital sensor.
Often sensors are known to mention the DR as dB (decibels). The following information is from here.
The dynamic range of a device is the difference (contrast) between the minimum and maximum signal it can faithfully record. It is sometimes expressed as a ratio between the minimum and maximum radiance (decibels). For reference, an exposure stop difference, one EV is approximately 6 dB (decibles). Image density is frequently expressed as brightness measured with a densiometer on a logarithmic scale of 0 to 4. A density of 3.0 is 10 times greater intensity than a density of 2.0. A contrast range of 100:1 is a density range of 2.0, and 1000:1 is a range of 3.0.