Astrophotography Calc

Calculate your desired shutter speed for your starry night sky picture with ease. All you need to do is just enter your camera parameters.
Pick one a camera from existing camera list which contains more than 250 entries. Edit camera list the way you want to. Can't find one that you need? Simply add it to the list.
Calculate exposure using 300 rule, 500 rule, 600 rule or NPF rule.
Astrophotography calculator is a simple tool made for photographers. It calculates longest shutter speed, exceeding which star trails should appear in picture, using selected rule. If your photo has to contain trails – pick exposure longer than calculated. If it shouldn't – shorter than calculated.