Hi Mark, You are using PHD or PHD2? In PHD2, on the 'Connect Equipment' chose INID Camera (DSI CCD) (or close to this string). This assumes you do have the INDI_DSI_CCD driver loaded, as you mention "I can see my DSI under EKOS" A quick tutorial www.amateurastrophotography.com/astrophotography-guiding-p2 GeneRead More...