HomeAppsBooks & ReferenceAstrophoto CalculatorApps like Astrophoto Calculator Here are some great alternatives to Astrophoto Calculator by W. Strickling : Photo Tools ★3.6 Photo Tools PRO ★4.4 Telescope calculator pro ★4.5 Telescope calculator ★4.1 Bellows Factor ★4.4 Photography Calculator Tools ★4.2 Photo Tools ★3.5 FotoTool - Photographer Tools ★4.5 Ephemeris: Sun and Moon Seeker ★3.5 Hyperfocal - (calculator) ★3.8 Photo Friend exposure & meter ★4.3 Photographer's companion ★4.0 Photo Metadata Viewer ★3.3 SkEye Cam ★4.3 Light Meter ★3.9 SmartSpy Camera ★4.0