The latest craze in FPV is going micro. The Ultra light 25mW 5.8GHz micro video transmitter from the guys at AltitudeRC is compatible with Fatshark and Skyzone goggles (Band D) . The transmitter antenna is the same as many 2.4GHz receiver antennas and requires snipping the end to the appropriate length, don't worry a template is provided and it's very easy. The advantage is a super light weight set up.
Power connector : JST RCY (standard battery) female
Camera connector : JST SH on the transmitter, loose end wire to camera.