The 20-cm Schmidt-cassegrain Telescope

This is a guide to the use of the compact, 20-cm (8-in) Schmidt-Cassegrain telescope which has revolutionized amateur astronomy and astro-photography. Manly tak... » 

This is a guide to the use of the compact, 20-cm (8-in) Schmidt-Cassegrain telescope which has revolutionized amateur astronomy and astro-photography. Manly takes the telescope owner through all aspects of using the telescope in easy stages. «