For years now manufacturers of sensors have been focusing on the miniaturization of their products. Thanks to that many cameras have been made extremely lightweight and compact while their quality and performance was enhanced.
However, due to their technological requirements (several embedded sensors, central units, etc.), a lot of specific sensors are still heavy. In such cases a drone with just enough torque to carry a pocket camera is just not enough.
This is exactly why the OnyxStar HYDRA-12 was designed for.