Back to NGC7000, the North America nebula, this time with a Sigma 105mm f/2.8 lens. For this image, 10 x 5min images were captured through both H-alpha (used for the red channel) and OIII filters (for blue). The red and blue layers were then combined in the ratio 60:40 to make the green layer, and the R, G, and B were then assembled into the final image.
A bit more exposure would have helped, but I was quite pleased by how much detail I was able to tease out of it, nevertheless. Guiding worked flawlessly, possibly helped by the fact that I’d spent a bit of time improving my polar alignment.