This is the rich nebulosity in Cygnus captured in colour but with a blend of unfiltered and filtered images for an Ha-RGB mix to bring out the faint nebulosity.

At lower left is the North America Nebula region, NGC 7000, and at upper right is the complex around Gamma Cygni, called IC 1318. At far right is the Crescent Nebula, NGC 6888. The bright star Deneb is left of centre.

This is with the Canon 135mm L-series telephoto lens wide open at f/2 and with the red sensitive Canon EOS Ra camera, tracked but unguided, for:
- a stack of 6 x 2-minute exposures at ISO 400 with no filter
- a stack of 6 x 2-minute exposures at ISO 800 with a NISI Natural Night front-aperture filter
- a stack of 6 x 2-minute exposures at ISO 800 with an Astronomik CLS clip-in filter
- a stack of 11 x 4-minute exposures at ISO 3200 with an Astronomik 12nm H-Alpha clip-in filter.

These were taken as a demo set to use to compare filters but in this case I combined all of them into one image, just for fun!

All images aligned and stacked in Photoshop, with the H-Alpha set blended into the colour set using an image layer blended with Lighten mode (not Luminosity) and with a clipped Levels adjustment layer with the red channel adjusted in Levels to add the false colour red to the otherwise monochrome layer and then with the H-alpha layer backed off a lot in Opacity. This worked better than replacing the red channel with the H-alpha image, as it gave much more control over the intensity and contribution of the Ha image, and seemed to align better as the star images through the various filters did differ in size.

Luminosity masks created with Lumenzia extension panel used in part to bring out fainter nebulosity.

This was on June 9-10, 2020 with the sky lit by moonlight from the low waning gibbous Moon for the H-Alpha shots and by perpetual twilight, though the Milky Way was visible.