SkyWatcher 90/900 AZ3 Refractor TelescopeThe Sky Watcher 90 900 Refractor telescope is a two element, air spaced, fully multi coated objective, achromatic refractor. It allows you to view detailed vistas of star fields, clusters, nebulae, planets and other celestial bodies. It makes a fine terrestrial telescope when mounted on an alt azimuth mount. Premium Astronomy and Terrestrial Observation Sky Watcher 90 900 refractor telescope is a well proven performer in value for views of comets,