Telescopes
Can't save telescope aperture in Object calculator - APT Forum
How accurate are the images in this FOV calculator? - Beginners Forum (No Astrophotography) - Cloudy Nights
How to Choose Your Telescope Magnification - Sky & Telescope - Sky & Telescope
Exposure Time Calculator Lhires
Light Vortex Astronomy - Article: How to Very Accurately Calculate your Telescope's Effective Focal Length
Telescope Calculator: How Does Your Telescope Perform? | Sky & Telescope - Sky & Telescope
Telescope common aperture size comparison chart - Beginners Forum (No Astrophotography) - Cloudy Nights
How to Choose A Telescope for Astronomy | Types of Telescopes - Sky & Telescope
Astronomy Tools
Telescope, CCD and Eyepiece Calculator - Deep Sky Watch
Aperture Area Calculator - Calculator Academy
Dome Calculation - the homepage of Nicolàs de Hilster, PhD
How to Calculate the Field of View of Your Telescope - StarLust
Light Vortex Astronomy - Article: How to Very Accurately Calculate your Telescope's Effective Focal Length
astronomical optics, part 3: the astronomical image
Tele Vue Optics: The Majesty Factor
Astronomy Calculator | Teledyne Princeton Instruments
Telescope, CCD and Eyepiece Calculator - Deep Sky Watch
astronomical optics, part 3: the astronomical image
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
Two-mirror telescopes: Cassegrain, Gregorian and variants
Newtonian Reflecting Telescope Designer
Telescope Magnification Calculator
Telescope, CCD and Eyepiece Calculator - Deep Sky Watch
