› Forums › General Discussion › Impurities on the ccd sensor? › Reply To: Impurities on the ccd sensor?
4 March 2025 at 7:42 pm
#628609

Participant
It is dust and dirt in the optical path somewhere. Things directly on the sensor can appear nearly focussed, things on the lens of a refractor can appear grossly out of focus. These things look to be between the two. Are you using any filters near the sensor?