Sky watcher equinox 80 pro 80mm 31 f500 fluorite ed apochromatic refractor optical tube assembly the sky watcher equinox ed ds pro series is the name for the new generation of professional quality telescopes and mounts of the sky watcher range targeted at the most discerning and critical observersthe sky watcher equinox series contain the same first class optics as used in the evostar ds pro refractors but housed in cnc machined hard anodised tube assemblies they feature rotatable ten