Free Astrophotography Shutter Speed Calculator

How to use:

Input your focal length in the top field

Select your camera type (APSC, Full Frame, Micro Four Thirds) etc.

Select the rule you want to apply (300 rule or 500 rule - 300 rule will give you a bit of a cushion).

Dial the exposure into your camera and have fun shooting!

Bookmark this page so you can come back easily!