Sony FX 6 Quick Start Manual page 153

S & Q: fast motion and timelapse
Setting a lower S & Q rate than the frequency/scan rate will result in fast
motion. A S & Q rate of 1 fps will be timelapse.
For example, if your base (project) frame rate is 24p and you record 10
minutes at the S & Q frame rate of 12 fps, the playback time will be 5
minutes. It is two times faster.
All of the frames play back, but at a different speed.
When shooting fast motion it is not necessary to have the shutter speed be
twice the S & Q frame rate. In the above example, I could shoot at 12 fps
with a shutter speed of either 1/24 th of a sec. or 1/48 th of a second. At 1/48 th
motion is more crisp. At 1/24 th there is more motion blur, and increasingly
more blur as you lower the shutter speed.
If your frequency/scan rate is 24p and you record 10 minutes at S & Q speed
of 1 fps, the playback time of the clip will be 24 seconds. It is 24 times faster.