PrimaluceLab Temperature Sensor for SESTO SENSO and ECCO colour astro camera So it is not a

So it is not a "must

introduce new 1

even after many years

makes the filter's effect clear: The combination of excellent blocking of all unwanted light from UV to IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor

WARNING: The filters of OPTOLONG are not designed for sun observation

PrimaluceLab Temperature Sensor for SESTO SENSO and ECCO colour astro camera So it is not aFocusing Compensation with SESTO SENSO Paired with SESTO SENSO, the sensor adjusts the telescope's focus in response to temperature changes. This temperature based focus compensation ensures sharp, clear images, even as environmental conditions fluctuate. Key Features Compatible with both ECCO and SESTO SENSO Automatic dew heater control with ECCO Temperature driven focus compensation with SESTO SENSO Improves imaging quality during temperature changes