AstroExposure

AstroExposure helps you quickly calculate the ideal exposure time for photographing stars without trailing, using the 500 rule (for beginners) or the NPF rule.

AstroExposure is a simple, precise calculator for planning your night sky photography.

Choose your calculation method, enter your focal length, aperture, and sensor specifications, and instantly get a recommended exposure time to minimize star trailing.

The app supports the most widely used astrophotography rules, including the 500 Rule and the NPF Rule. You can also select a camera from the built-in database, adjust settings manually, and save your favorite configurations.

Key features: • Astrophotography exposure time calculation • 500 Rule and NPF Rule support • Sensor or camera selection • Focal length, aperture, and pixel size settings • Favorites for quick access to your settings • Clean, fast, and distraction-free interface

AstroExposure is designed for photographers who want to spend less time calculating and more time under the stars.