The NPF Rule Shutter Speed Calculator is an essential tool for astrophotographers who want to capture stunning images of the night sky without the star...
Formula
const focalLength = inputs.focal_length; const aperture = inputs.aperture; const pixelPitch = inputs.pixel_pitch; const shutterSpeed = 35 / (focalLength * (aperture + (30 * pixelPitch))); return { shutter_speed: shutterSpeed };Focal Length (mm)
50
Aperture (f-stop)
2.8
Pixel Pitch (microns)
4.3
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NPF Rule Shutter Speed Calculator estimates Shutter Speed (seconds) from Focal Length (mm), Aperture (f-stop), Pixel Pitch (microns). Use it to compare scenarios and understand which inputs drive the biggest changes. Results are directional estimates — verify with current, authoritative sources before making financial, legal, or health decisions.
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The estimate combines Focal Length (mm), Aperture (f-stop), Pixel Pitch (microns) and returns Shutter Speed (seconds).
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