In order not to haul unnecessary extra weight I used a OMD E-M1 with a new 12-40mm. This 16 pix camera has perfect functions and in combination with the lens she does not only has just half the weight of their competitors from Nikon and Canon, but its sensor has a "On-sensor Phase Detection" which allows to fine-tune the auto-focus for each of the 37 phase-detection points. Moreover the E-M1 can track-focus on a moving object while shooting at 6.5 fps, with a buffer of 60 frames when shooting RAW.
This all results in a stunning image quality when the camera actually is so far away up in the air. Because flying the drone is not as easy as it looks like its is better to work in a team of two, so one can fly while the other is using the remote control and wifi. The primary function of the E-M1's Wi-Fi feature is to transfer images from the camera off to a smart-phone - either your own or that of a friend - and it tries to make this as simple as possible. In addition to transferring images from the camera, the E-M1 can also be remotely controlled from a smart-phone. The Videography feature with its 1920 x 1080 (30 fps) is as well enough for a good quality and the times for hiring a copter are hopefully over.