2021 [upd] — Astro Fov Calculator

Optimum pixel size calculation with field reducer - Facebook

If you prefer not to do the math manually, these platforms provide interactive FOV simulators: astro fov calculator 2021

The simulator showed a blue rectangle—his Field of View (FOV)—representing exactly how the nebula would look on his sensor. It was too big for his setup! Optimum pixel size calculation with field reducer -