How do you guide when your telescope mount has an ST-4 Guide Port but your camera does not? This USB-to-ST4 Adapter from ZWO adds the functionality you need to guide with an ST-4 compatible mount and a computer with at least one standard USB port and loaded with an autoguiding program like PHD Guiding from Stark Labs.
This small, lightweight adapter accepts a cable on each end. One cable connects to the USB port of your computer and the adapter, and the other plugs into the ST-4 Guide Port and the adapter. Both cables are included with the USB-to-ST-4 Adapter, and are approximately 6.5-feet long. The free ASCOM driver will need to be downloaded to your PC before you start guiding, and you will also need guiding software to control your mount and camera. ZWO recommends PHD Guiding from Stark Labs. It is compatible with the adapter as well as a multitude of mounts and cameras. It is includes USB ST4, 2m USB cable, 2m ST4 wire cable