dot artifacts

Robin Leadbeater

Hi Paul,

They look like trails of hot pixels. Is this an aligned sum of several individual exposures? 

(IC1296 brings back memories. It was a test of how deep I could go with my first astro camera, a surveillance  camera which I modified for long exposures in 2002).

The resulting LRGB image of M57 even made it into Astronomy Now. Cutting edge then !