Astrography and Equipments

Astrography under a good astronomical seeing is the main desire for astronomers all around the world. Seeing is the most important factors for DSO or planetary image quality. Practically all professional observatories are located on locations with sub-second seeing, where seeing values are bellow 1 arcsec, but amateur astronomers are doing astrography under the sky where is the common seeing between 2 – […]