Considerations for Optimizing Newtonian Reflecting Telecope Optical Design
By John Lynch
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.
TWO TO DRAW TO
By William Cook
"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?