Sky-Watcher Evostar-150 (EQ-5) 150mm (6"") f/1200 Achromatic Refractor Telescope. The Sky Watcher Evostar series are two-element air-spaced, multi-coated object achromatic refractors. They are truly outstanding, high-performance; high-resolution instruments manufactured to extremely high standards and mechanical precision. With their long focal lengths and breathtaking optical performance, they are ideal for the detailed high-power study of the moon, Planetary Surfaces and other objects in out solar system, giving crisp contrasty images. These telescope packages will stand you in great stead for a lifetime of serious astronomical viewing.