Frame synchronization in a dual-aperture camera system

A system, comprising:

• a dual-aperture camera that includes a first camera operative to output a respective first camera output and a second camera operative to output a respective second camera output;
• and
• a synchronization and operation control module configurable to control operation of one camera in a fully operational mode to provide a first frame and operation of the other camera in a partially operational mode to provide a second frame, and to synchronize a parameter of the output of the camera operating in fully operational mode with a parameter of the output of the camera operating in partially operational mode before obtaining a depth map from the first and second frames,
• whereby the obtaining of the depth map with one camera in fully operational mode and the other camera in partially operational mode requires less power consumption that the power consumption required when both cameras operate in fully operational mode.