Indeed. If your drone carries a rotary shutter film camera, then you are right.
I apologize for my ignorance.
It doesn’t of course but motion blur is still important even with an electronic shutter no? Now that we have established that there are two 180 degree rules in cinema which you were absolutely correct about the one, I think RED does a good job of explaining how the “concept” of shutter angle is still important. I think we can still all be correct here.
“CONCEPT
The "shutter angle" is a useful way of describing the shutter speed relative to the frame rate. This term is a conceptual relic of rotary shutters, where a disc with an angled opening would spin and let in light once per revolution to expose each frame. The larger the angle, the slower the shutter speed, all the way up to the limit of 360°, where the shutter speed could become as slow as the frame rate. At the other extreme, the shutter speed can be made arbitrarily fast by decreasing the angle.
Exposure Duration (in Red) at Three Shutter Angles
Although current cameras don't necessarily control shutter speed in this way, the shutter angle terminology has persisted as a simple and universal way of describing the appearance of motion blur in video. If one wants subjects that are blurred for a greater fraction of their frame to frame displacement, then one would choose a larger shutter angle, and vice versa.
APPEARANCE
By far the most common setting for cinema has been a shutter angle near 180°, which equates to a shutter speed near 1/48 of a second at 24 fps. Any larger, and motion appears more smeared since the end of blur in one frame extends closer to the start of blur in the next frame. Any smaller, and the motion appears more stuttered and disjointed since the blur gap increases, causing frames to become more like discrete images.
(Frozen Motion for Three Successive Frames)
(Overlaid Motion Blur vs. Shutter Angle
180 degrees)
Although the above example is helpful for understanding the underlying behavior, one typically doesn't see motion blur within each frame as they would in a still image. In practice, the shutter angle also has a more subjective influence on the overall feel of motion footage even if one isn't necessarily aware of the precise settings.”
(
https://www.red.com/red-101/shutter-angle-tutorial)
So the concept still remains relevant even though, as you corrected point out, it no longer refers to the physical rotary shutter on the camera but the term is still used to describe the relationship between frame rate and shutter speed.