Calcolatore Scala Pixel — Formula

Pixel Scale in Astrophotography

Pixel scale tells you how much sky each pixel of your camera sensor covers.

Formula

pixel_scale = 206.265 * p / f

  • *p* = pixel size in micrometres
  • *f* = focal length in mm
  • 206.265 is the conversion factor from radians to arcseconds (with the mm/um unit adjustment)

    • A good rule of thumb is to match pixel scale to about half the typical seeing (e.g., 1 arcsec/px for 2-arcsecond seeing).

    Esempio Risolto

    3.75 um pixels on a 1000 mm telescope.

    1. scale = 206.265 * 3.75 / 1000
    2. scale = 773.5 / 1000
    3. scale = 0.7735 arcsec/px