Night Sky Observer's Guide Volume 3: The Southern Skies Globes Calibrate your telescope so that

Calibrate your telescope so that you know exactly how much sky you see through your finder and through the eyepiece of your telescope

” – Larry Mitchell

by eliminating the vagaries of shadow cutoff estimation (except at the very edge of a tested mirror)

The program is designed to make the data processing and analysis relatively easy and quick and provides features that allow whole system assessment by inclusion of secondary mirror error and on-axis eyepiece primary spherical aberration

Not only does Binocular Astronomy help you locate objects but it explains what they are and how they fit into our understanding of the universe

Night Sky Observer's Guide Volume 3: The Southern Skies Globes Calibrate your telescope so thatBy George Robert Kepple, Ian Cooper and Jenni Kay The original purpose of The Night Sky Observers Guide was to close the gap between observing literature and modern optics. It provided the owner of a medium or large aperture telescope with some idea of what to look for in such instruments both what objects can be seen, and what details may be seen within these objects. Now, with four volumes, it has become an indispensable resource for observing. The