Abstract: The present disclosure relates to an imaging device, a control method, and a program that make it possible to cope with various cases in which a plurality of communication standards is assumed to be mixed. A communication unit performs communication according to a first communication standard and a second communication standard. A communication compatibility processing unit performs communication compatibility processing necessary for maintaining communication compatibility in a case where an imaging system is assumed, the imaging system mixedly including a first external flash supporting only the first communication standard and a second external flash supporting both the first communication standard and the second communication standard. The present technology can be applied to, for example, an imaging system including an imaging device and an external flash.

Abstract: The present disclosure relates to an imaging system, a control method, and a program capable of optimizing a release time lag. An external flash transmits a light emission preparation time from when reception of a light emission command is completed until when a light emission trigger is acceptable. An imaging device communicates with the external flash, acquires the light emission preparation time, and optimizes an output timing of the light emission trigger on the basis of the light emission preparation time. The present technology is applicable to, for example, an imaging system including an external flash and an imaging device.