The Telescope

A practical guide for observers and students that presents the principles, construction, and practical use of telescopes accessible to amateurs. It surveys historical development from early spectacle lenses to contemporary refracting and reflecting instruments, then explains optical materials, objective and mirror properties, eyepiece designs, and mounts. The author details common accessories, binoculars, testing and maintenance procedures, and considerations for siting and housing instruments, while distinguishing photographic telescopes as a specialized field. Throughout, emphasis is on clear, usable explanation of how components affect performance, magnification, and observational seeing.