~22.2mm x 14.8mm (Canon) or ~23.5mm x 15.6mm (Nikon/Sony/ZWO) Micro Four Thirds (4/3"): ~17.3mm x 13mm 3. Pixel Size Measured in micrometers (
You are spreading the light over too many pixels, which can result in bloated stars and blurry images due to atmospheric turbulence (seeing limits).
If you were building an astrophotography rig in 2021, you faced a universal dilemma. You had a new telescope, a shiny CMOS camera, and a target list featuring the Orion Nebula. But one question loomed: Will Andromeda fit on my sensor?
Telescopius is arguably the most robust visual framing tool available. It allows you to rotate your camera sensor overlay in real-time, plan complex multi-panel mosaics, and check the altitude coordinates of the object to see when it clears local trees or structures. Stellarium (Desktop & Mobile) astro fov calculator 2021
If you prefer working in (1 degree = 60 arcminutes), there is an even faster mental shortcut used by many imagers: FOV (arcmin) = (Sensor Size in mm / Telescope Focal Length in mm) x 3438 .
Using platforms like Astronomy.tools or the Sky at Night Magazine calculator, you can now predict your exact view with certainty—saving yourself the frustration of discovering on a cold night that the galaxy you wanted to see is far too big for your current setup.
While FOV tells you how much sky you see, Pixel Scale tells you how fine the detail is within that sky. It is calculated with a different constant. You had a new telescope, a shiny CMOS
An ideal pixel scale for deep-sky imaging sits between . Knowing this prevents you from wasting storage space on over-sampled images that your local atmospheric conditions cannot support. Maximizing Limited Imaging Time
: Run the formula for both width and height to get your total rectangular frame size in degrees. Key Factors Impacting Your View
An is a digital tool that allows astrophotographers to simulate how a specific combination of a telescope (or lens) and a camera sensor will frame celestial objects. By inputting your equipment’s specifications, these tools overlay a rectangular frame on a star map, helping you decide if a target fits within your sensor or if you need to plan a multi-pane mosaic. Top FOV Calculators for 2021 It allows you to rotate your camera sensor
Optimum pixel size calculation with field reducer - Facebook
If you prefer looking through an eyepiece, you are dealing with a specific component inside the barrel called the . This is the metal ring inside the eyepiece that cuts off the view. The formula is slightly different.