Formulas - Telescope Magnification
Focal length - Wikipedia
Tele Vue Optics: Imaging Methods
Lowest and highest useful magnification - Optics Trade Blog
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
Telescope Equations: Magnification
Telescope stats explained | BBC Sky at Night Magazine
NASA - Build a Telescope
Telescope, CCD and Eyepiece Calculator - Deep Sky Watch
Newtonian Reflecting Telescope Designer
Telescope Equations: Magnification
Telescope Magnification Calculator - Calculator Academy
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
How to Choose Your Telescope Magnification - Sky & Telescope - Sky & Telescope
Refractive Telescopes
Focal length, explained by RP Photonics Encyclopedia; focal distance, dioptric power, curved mirror, lens equation, microscope, photographic objective, focus, beam radius
Light Vortex Astronomy - Article: How to Very Accurately Calculate your Telescope's Effective Focal Length
Cassegrain Formulas and Tips by Mike Lockwood
Formula to estimate exposure from aperture & F ratio - Beginning Deep Sky Imaging - Cloudy Nights
Tele Vue Optics: The Majesty Factor
Telescope Equations: Minimum Magnification
Cassegrain formulas.
Telescope Equations
Light Vortex Astronomy - Article: How to Very Accurately Calculate your Telescope's Effective Focal Length
