The power of the Astro FOV Calculator went mobile in 2021, with several excellent apps putting the math in your pocket.
There are two primary formulas for calculating the true field of view. Both will give you the same result, so you can use whichever information you have. astro fov calculator 2021
Enter your telescope or camera lens focal length. If you are using a (e.g., ) or a Barlow lens (e.g., ), multiply your native focal length accordingly. Example: A 1000mm telescope with a reducer has an effective focal length of 700mm. Step 2: Input Your Camera Specs The power of the Astro FOV Calculator went