No other telescope design offers the combination of features and portability as a Schmidt-Cassegrain telescope (SCT). You may not consider it the best for any one application, but it does everything ...

In this paper, I present a simple technique for collimating the secondary mirror of fast focal ratio wide-field Cassegrain telescopes. This technique minimizes both coma and astigmatism across the ...

Got a budget Newtonian telescope? Learn the top secrets and upgrades that can transform your cheap Newt into a powerhouse for astrophotography. From collimation tips to camera choices, we cover ...