GROISI STUDIO — Astro Planning Calculator Quick conversions + framing math for astrophotography (angle, time, distance, image scale, FOV). Groisi Tools Tool Angle conversions (deg / arcmin / arcsec / rad) Time conversions (sec / min / hour) Distance conversions (km / AU / ly / pc) Image scale (arcsec / pixel) Field of View (degrees) FOV + Image scale (camera preset) Rounding 2 decimals 4 decimals 6 decimals 8 decimals Camera sensor preset Pixel size (µm) Sensor width (mm) Sensor height (mm) Focal length (mm) Binning / effective pixel size 1× (native) 2× (effective pixel size doubles) 3× 4× Tip: Use this for quick “Will it fit?” framing checks. Pixel scale formula: 206.265 × (µm/mm) Copy summary Reset defaults Value Input unit Pixel size (µm) Focal length (mm) Formula: arcsec/px = 206.265 × pixel_size(µm) ÷ focal_length(mm) Sensor width (mm) Sensor height (mm) Focal length (mm) Exact geometry: FOV = 2 × atan(sensor_dim / (2 × focal_length)) → degrees
