Astrophotography is an art that requires careful consideration of various factors, including exposure time, especially when shooting in light polluted skies. Light pollution can significantly affect the quality of astrophotography, making it challenging to capture the beauty of the night sky. This calculator helps photographers determine the optimal exposure time based on their camera settings and the level of light pollution in their environment. By inputting the ISO setting, aperture, time multiplier, and light pollution level, users can calculate an appropriate exposure time to achieve stunning astrophotography results. For more information on light pollution and how to mitigate its effects, visit darkest-hour.com.