Tag: ED Doublet Refractor

Sky-Watcher Evostar 72 APO
News

Sky-Watcher USA’s New Addition to its Evostar Apo Doublet Refractor Telescopes Offer High Performance

Sky-Watcher USA’s Evostar refractors are offered from 72mm – 120mm in aperture and are designed to provide the finest images obtainable in their design class. These doublet refractors feature matched lens assemblies with an ED element. The EvoStar refractor lens assembly utilizes a proprietary combination of matched lenses, designed to […]