Hi, I’ve just taken delivery of the above camera. My problem is the I need to switch between the main camera and the guide camera to achieve guiding focus, if you see what I mean. But I’ve tried to switch between cameras. I.e making the guide camera the main camera so as to achieve focus then I can switch the camera to the 585 as the main camera, but unless I turn everything off, I cannot switch, what do I need to do? Anyone advise please