Optical system of a telescope
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
what telescope should i look for?
Telescope stats explained - BBC Sky at Night Magazine
Cassegrain Formulas and Tips by Mike Lockwood
Tele Vue Optics: Imaging Methods
Telescope Equations: Magnification
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
astronomical optics, part 3: the astronomical image
Telescope, CCD and Eyepiece Calculator - Deep Sky Watch
Schmidt-Cassegrains — Starizona
Aperture, focal length and focal ratio - Optics Trade Blog
Telescope Astronomy Physics - Notes
what telescope should i look for?
Formula to estimate exposure from aperture & F ratio - Beginning Deep Sky Imaging - Cloudy Nights
How to Calculate Telescope Magnification
Two-mirror telescopes: Cassegrain, Gregorian and variants
Telescope Equations: Minimum Magnification
Refractive Telescopes
Formulas - Telescope Magnification
Refractive Telescopes
Light Vortex Astronomy - Article: How to Very Accurately Calculate your Telescope's Effective Focal Length
