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I just purchased an Orion CCD autoguide camera that has the built in ST-4 interface. I did so because I thought that would be a cleaner connection directly from the ccd autoguide camera to the mount. But I just read that if you use the CCD ST-4 interface directly to the camera, the protocol does not support providing pointing information to the guide software. e.g. PHD documentation states that if you use CCD -> PHD -> USB 2 serial interface -> hand controller, then PHD can tell what side of the mount the telescope is on and where it is pointing so it can guide better and you don't have to reverse stuff when you flip. But if you use the RT-4 interface, PHD can not obtain that information since the protocol does not support it. Thinking of returning the Orion CCD for one that does not have ST-4. Would that be the correct thing to do? Thanks, Lloyd