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AstroBrainCalculators
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Plan

  • Tonight
  • Targets
    • Saved targets
  • Plan a night
  • Night plans
    • Logbook

Tools

  • Sky atlas
  • Field of View
  • Night Outlook
    • Weather
  • Exposure Lab
  • Calculators
  • Horizon Studio
  • Sequence Studio
    • Nights
    • Projects

Setup

  • Settings
  • About & Support
  • What’s new

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Preparing AstroBrain

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Imaging

Sampling calculator

AllField of viewSamplingImage scaleFocal ratioFocal length for seeingEyepieceBinocularsResolving powerDust shadowGuide scope

Telescope

mm
Reducer / Barlow
×

Camera

µm
Binning

Sky

″
Well sampled
Pixels per star FWHM
2.32px
Image scale
1.29″/px
Seeing
3.0″

A 3.0″ star spans 2.3 pixels: your pixels match this seeing.

s = 206.265·p·b / f = 206.265·3.76·1 / 600 = 1.293″/px · n = seeing / s = 3.0 / 1.293 = 2.32