Equipment/Optics

Amateur astronomers have a choice between instruments that are commercially available or becoming amateur telescope makers and building ones that are more suited to their needs. For the latter, the amateur has the freedom of instrument design as well as selection of specific components that represent the best available instead of compromising with what is provided with a commercially built unit.

Your telescope's static balance can be achieved even when using a wide range of oculars.

This telescope mirror shadow tester doubles as an artificial star test.

Many eyepieces that I have found to be excellent in most respects I ultimately sold in part or whole due to the eyepiece having EOFB. What is Edge of Field Brightening?

The things that matter and the things that don't.

"What's the most powerful binocular you got?" and "How far can I see with it?" are two of the most common and least useful questions customers ask about binoculars. Why is that?