AstrAFocus

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AstrAFocus#

A Python package for automated telescope focusing.

AstrAFocus sweeps a focuser through a range of positions, measures focus quality at each step, and determines the optimal position — all through a hardware-agnostic interface that works with real equipment or built-in simulators.

Key features#

  • Two autofocus strategies: analytic curve fit (parabola) and non-parametric smoothing (LOWESS, spline, RBF)

  • 13 focus measure operators: star-size estimators (HFR, Gaussian) and image-sharpness metrics (FFT, Tenengrad, Laplacian, …)

  • Device abstraction: plug in any camera and focuser, or use the CabaretDeviceSimulator for hardware-free development

  • Sky targeting: find suitable focus fields near zenith from a Gaia-2MASS catalogue

Introduction

References

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