Astro Fov Calculator Top [portable] Guide

No math required — just a stopwatch.

Look at the rectangle representing your sensor. astro fov calculator top

No accounts, no complicated menus. Enter your scope’s focal length and eyepiece specs. It gives you the TFOV in degrees and arcminutes instantly. No math required — just a stopwatch

If you prefer manual calculations or need to verify a calculator's output, use these standard formulas: The Telescope Platform Card Builder - Cosgrove's Cosmos astro fov calculator top