Yes, the CMOS camera chip (CCDs are only used in astronomy any more) has a sort of shutter, but it’s not mechanical. The chip is scanned row by row, and the integration time, which is the time between when the row is reset (the photon counters are reset to zero) and when it’s read out, is controllable by the camera electronics.
This is called a rolling shutter, because the rows are read out in series, so the effect is similar to that of a focal plane shutter on an old 35mm film camera. That’s why the props appear bent.
The funny thing is, I had to go back and read it myself to understand the context of what I meant. I was like, “Did I really type that sentence? Just like that?”
I think that helicopters keep the rotational speed constantish and change angle of attack of the blades to give more or less lift, changing engine throttle settings to suit the increasing and decreasing need for power
