Watch the sun in H alpha with the Sky Watcher Heliostar 76mm
Specifications Aperture: 3 inches / 76mm Focal length: 25-inches / 630mm Focal ratio: f/8.3 Optical design: Achromatic doublet dedicated H-alpha refractor Filter type: Hydrogen-alpha,…
Specifications Aperture: 3 inches / 76mm Focal length: 25-inches / 630mm Focal ratio: f/8.3 Optical design: Achromatic doublet dedicated H-alpha refractor Filter type: Hydrogen-alpha,…