Rigel nFOCUS Temperature Sensor
Rigel nFOCUS Temperature Sensor
Rigel has designed this temperature sensor to allow you to easily focus without worrying about temperature variations. Simply attach this nFOCUS adapter via USB and your autofocus software will automatically compensate for temperature changes.
Telescopes change focus as temperature changes expand/contract the length of the telescope tube as temperature increases/decreases. Unlike internal temperature sensors located inside the controller that are affected by the heat generated by the electronics, the external temperature sensor can be attached to the telescope to get a more accurate measurement of the ambient temperature.