Reviews

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Reviews

The GSO 8-Inch Ritchey–Chrétien Telescope

I recently reviewed a Guan Sheng Optical (GSO) 8-inch classical Cassegrain telescope for Astronomy Technology Today. In this article, I review the GSO 8-inch GSO Ritchey–Chrétien.  The classical Cassegrain would be the better choice for visual use, while the Ritchey–Chrétien is the better instrument for astronomical imaging. American astronomer George […]

Local Clear Sky Chart
Reviews

Apparent Magnitude – What Is It?

Apparent magnitude is something that every beginning and experienced telescope owner has to consider. I sometimes reminisce about my first telescope, an entry-level 115mm reflector. My family let me pick out (but not touch) the scope and assorted accessories well before Christmas, a holiday that rapidly became an eggnog-induced flurry […]

QHY Polemaster Review
Reviews

QHY Polemaster Review

In the absence of an observatory, typical viewing sessions require that I set up/tear down my scope du jour nearly every time. Though I have taken measures to ensure fairly consistent rough polar alignment, longer focal lengths and exposures necessitate some fine-tuning. My Celestron AVX and Losmandy G11G both have polar alignment […]