M16 - Eagle Nebula / Pillars of Creation

Eagle nebula, shot from Paris downtown.

30° above horizon

22x180s, dark, bias, flat

Canon 7D modded - Astrodon Inside

ISO 800

Lens : Canon 400mm f5.6 @ F5.6

Astronomik Ha filter 12nm

AstroTrac unguided

Stacked in DSS, post-processed in Photoshop

Full image

 

I thought I would get nothing considering sky condition, so I didn't push for perfect drift alignment, focus nor long exposure. I should have...

Done