The ZWO EAF Temperature Sensor is made to be used with the ZWO Electronic Automatic Focuser, to ensure you have perfect focus as the temperature changes. The focus point on a telescope will change when the temperature changes. With this temperature sensor, you won't have to worry about the changing focus point, as this will help you stay in focus!

• Temperature Sensor for the ZWO Electronic Automatic Focuser.
• Ensures you have sharp focus, even when the temperature shifts the focus point.