DESC: This high quality altazimuth refractor is an excellent choice for the more serious beginning astronomer or terrestrial observer. It's a powerful optical instrument with over 165 times the light gathering ability of the naked eye. This ability allows the FirstScope 90 AZ to deliver images 78% brighter than those produced by a 60mm refractor telescope. The objective lens is designed to yield the finest images available in this class of optical instrument. The accessories for this telescope are all made of glass with metal construction, to ensure good image quality