General How do electronic shutters work?

J

JaredSMark

Active member
As far as I understand it, on a macro scale, your camera saves a frame once every 1/24th of a second if you select a 24FPS frame rate. The frame capture times are evenly-spaced throughout 1 second and are always saved at that interval (1/24). That's as far as I understand it. The electronic shutter seems a bit more complicated though.

So again on a macro scale, does the electronic shutter (sensor) just 'pulse' on and let that frame be exposed for however long you've set the shutter speed to, then turn off and wait for the next frame interval?

I know it's a bit more complicated than that because it saves/scans the rows of pixels in a certain order or something like that, but I wanted to clarify.
 
higher sample rate from the sensor, so yes it's read FASTER and therefore results in "higher shutter speed". Each row is read one by one however which means in 1/500th of a second the rows must be read very fast. Each sensor has some max speed read rate otherwise it will overheat..

A electronic global shutter can read all the photosites of the entire sensor array at the same time avoiding reading one line at a time. This minimizes skew plus doesn't require high speed row reading. The downside is global shutter sensors are not as light sensitive as regular sensors are, but even then they are pretty good. For example the Sony F55 uses a global shutter and has a native ISO of 1250. That's pretty good.
 
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