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the gas in the sensor chamber is extracted through one drying port and enters the drying tube
Latitude Range: 0° to 90°
periodic horizontal banding is not removed with stacking so it may appear in the final image
Because of this difference
A series of engraved letters on the barrel helps to monitor orientation
Celestron Smart DewHeater Controller 2X with 2 Ports - 94035 (Pre-owned) Field De-Rotator the gas in the sensorIn excellent condition! Sold as is. The Celestron Smart DewHeater and Controller comes with two ports to control two dew heaters at once. You can use one port to heat your optical tube while the other warms a second optical tube, a guide scope, an eyepiece, or another accessory. The controller gathers and analyzes information in real time to warm your optics just enough to prevent dew. The controller also features an additional 12V DC output port so
