Does operating Tau2, or Quark2, or legacy Photon cameras at less than 9 Hz reduce the camera power consumption?

There is no difference in power consumption based on the camera's frame rate. The focal plane array runs at full rate even though the video output rate is reduced. The automatic gain control (AGC) and non-uniformity compensation (NUC) algorithms also run at full rate.

For Tau2 and Quark2 cameras there is an option for the power to be reduced by about 10% if the analog video is switched off, and digital video only is used. The analog video can be turned off using the Camera Control GUI.