Nebulae

The North American Nebula Samyang 135mm

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North American Nebula Ha
Hydrogen Alpha North American and Pelican Nebulae

Above is 120 minutes of Hydrogen Alpha in five minute exposures with an Astrodon Ha 3nm filter with a Samyang 135mm lens on a Moravian Instruments G2-8300 CCD camera.

Completed in RGB NAN
RGB data

I then captured one hour in each of the Astrodon R,G and B filters with the same rig as detail for the Ha image.  The colours are brought out nicely although it lacks a bit of punch and vibrancy.

The bright star to the right is Deneb.

HaRGB image

In Photoshop I broke out the red channel and then blended it as a 50:50 mix with the Ha image (at the top of this page) before recombining back into RGB.  I also saved a copy of this HaR constituent and then used that as a luminance layer to really make the image pop.  I then used a series of high pass filters to reveal finer structures in the image.

Alternate Version HaRGB

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