Whether you are planning a visual session or setting up for astrophotography, calculating your is essential for framing objects like the Andromeda Galaxy or the Moon. As of 2021, tools like astronomy.tools and Stellarium remain the industry standards for these simulations. 1. Best FOV Calculators (2021-Present)
(specifically the sections regarding CCD and CMOS imaging geometry). However, for a more modern technical overview of FOV calculations in the context of robotic telescopes and surveys, the following paper provides the necessary mathematical framework: Recommended Paper astro fov calculator 2021
If you prefer to calculate your FOV manually or are building your own tool, the standard geometric formula used by most calculators is: Whether you are planning a visual session or