{
  "name": "500 Rule and NPF Astrophotography Calculator",
  "short_name": "500 Rule and",
  "description": "Calculate the maximum exposure time for astrophotography without star trails. Classic 500 rule and high-precision NPF model for modern sensors.",
  "start_url": "/en/utilities/categories/astronomy/500-rule-calculator/",
  "scope": "/en/utilities/categories/astronomy/500-rule-calculator/",
  "icons": [
    {
      "src": "/images/utilities/star-exposure-calculator.webp",
      "sizes": "512x512",
      "type": "image/webp",
      "purpose": "any"
    }
  ],
  "theme_color": "#0f172a",
  "background_color": "#0f172a",
  "display": "standalone",
  "orientation": "portrait"
}