This may be a dumb question, but does the fps you choose also force you to set a shutter speed minimum floor? If you're at 60 fps, for example, doesn't that mean each frame cannot be longer than 1/60? Otherwise, you couldn't fit 60 frames into a second. Likewise, 30 fps requires a min shutter speed of 1/30. And 24 fps requires a min shutter speed of 1/24. What happens if you set your camera shutter speed below the required minimum that is set by the frame rate, if there is such a minimum?