North American Nebula - NGC7000

[Somerled7]

Here's my second attempt at the North American Nebula.  25*300s exposures at ISO400:-

- 300mm F4 Canon lens

- EOS80D + Astronomik CLS filter

- HEQ5 Mount

- QHY-5LII guide camera + Skywatcher 50mm finderscope used as the guide scope

I finished taking lights as the sun was coming up, so I went to bed and left the camera taking darks, but the battery ran out after the first 6.....doh!  

Processed in Photoshop, I've experimented using the Screen blend mode and luminosity masks to bring out the detail whilst preserving the star colour.  This seems more repeatable than applying arbitrary curve stretches., but I'm still experimenting with the processing.