Originally Posted By: Ernest49But is it better to calibrate point 0 during the day or at night? There is a passage that is not entirely clear to me when you say that you have to tilt the target by 10-20 degrees to get the light reflection of the aluminum adhesive tape. Does it mean that if you do the calibration during the day, the thermal device sees it better? But at moonless night, what light can it reflect? Maybe you need to light your target with a torch? I prefer to sight my thermals in during the day because everything works better when you can see. Tilting the target back allows more reflection from the tape, and makes the target easier to see whether day or night.
When I zero (calibrate) at night, I shine my vehicle lights on the target but any light would help reflect the light.
