Narrowband from a Bortle 9 sky

Montréal is about as bad as a place can be to photograph celestial objects. But nowadays, with 3nm filters, a small fast refractor, and a lot of patience, nothing is impossible. Every image here is the sum of many nights and countless hours of processing.

Each article records what was shot, what was thrown away, and why — including the frames that never made it into the stack.