Astro photography - How to shoot the night sky. Join the team from Welshot for an Evening of night photography. From low-light, long exposures to how to photograph the night sky this Welshot photographic event at Cwm Idwal in Snowdonia will keep you and your camera busy taking stunning images from before sunset to long after the sun has gone down. You will learn how to make long exposures to capture the lake and sky as well as clouds and dramatic mountain landscape in low light conditions. For those who would like to learn the art of light painting, we will be lighting up the picturesque bridge that leads up to the lake.