Focal plane illumination
Astrophotography: How to Determine Ideal Telescope Resolution and Image Sampling with AstronomyTools - YouTube
DIY Telescope Project
Telescope Magnification Calculator
Diffraction Limit Calculator - Calculator Academy
CCTV Lens Calculator – New generation of Lens Calculators for CCTV
How to Simply Calculate the Secondary Mirror Size – Astro Khan Telescope Making
Exposure Time Calculator Lhires
Telescope Magnification Calculator
Telescope Equations: Magnification
Telescope, CCD and Eyepiece Calculator - Deep Sky Watch
Light Vortex Astronomy - Article: How to Very Accurately Calculate your Telescope's Effective Focal Length
Optics Central - Telescope simulator - such a handy... | Facebook
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
Telescope, CCD and Eyepiece Calculator - Deep Sky Watch
Telescope calculator pro - Apps on Google Play
Astronomy Tools - Bintel
Ron Wodaski's CCD Calculator (Windows) - Download
Telescope stats explained | BBC Sky at Night Magazine
Telescope, CCD and Eyepiece Calculator - Deep Sky Watch
DobSTUFF - Complete Telescopes or Wood Parts for your Optics
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
