I own a NEX-5. I have bought also the external microphone by Sony. But for my pourpuse it'd be better to be able to connect the standard microphone port on the top of the camera to professional XLR microphones. I own also a microphone preamplifier but I need a cable to connect the imput of the preaplifier (3,5mm jack) to the microphone aoutput of the camera: Is anybody able to give me some suggestion to build by myself such a kind of cable? I think I need the electrical scheme and the right connector I need help!!