Before you power up your mount tonight, spend five minutes with an FOV calculator. Your hit rate of successful images will double, and your frustration will vanish. The stars are waiting—make sure you bring the right lens to see them.
N.I.N.A. is a free, open-source astrophotography suite that includes an advanced Framing Assistant panel.
You select your equipment from dropdown menus, choose a target (like the Orion Nebula), and click "Add to View." The tool overlays a colored rectangle representing your sensor over a real astrophotography image of the target. astro fov calculator top
You can manually enter focal lengths and sensor dimensions for niche equipment.
FOV (in degrees)=(Sensor Dimension (mm)×57.3Focal Length (mm))FOV (in degrees) equals open paren the fraction with numerator Sensor Dimension (mm) cross 57.3 and denominator Focal Length (mm) end-fraction close paren Example Calculation: If you are using a telescope with a and an APS-C sensor camera (width of ): Before you power up your mount tonight, spend
It allows you to add multiple equipment combinations simultaneously. This makes it incredibly easy to compare how a dedicated astronomy camera stacks up against your old DSLR on the same telescope. 2. Telescopius (Telescope Simulator)
Which specific are you hoping to photograph? Share public link You can manually enter focal lengths and sensor
If you choose to calculate your angular field of view manually, use the following standard formula:
Without a calculator, you are guessing. Guessing leads to:
Tell me about your current astrophotography setup by specifying your and your camera model . I can calculate your exact pixel scale and recommend the perfect deep-sky targets for your frame. Share public link
This is widely considered the gold standard for web-based tools. It features a massive database of nearly every telescope, eyepiece, and camera on the market.