M42/43; The Orion nebula. This image is a two section mosaic taken on two separate evenings under very clear moonless sky conditions. Stars were visible down to magnitude 5 with the air being very steady. I was using my ten inch f/4.8 reflector, a Vixen Atlux mount, PHD auto guiding , an Atik 383L mono CCD camera and a set of Astronomik narrowband filters . The filters were H-alpha, S11 and O111. I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. The total exposure times was 120 minutes for each narrowband filter.
Click on an image to get a closer view
Example of the light-pollution level
RGB image
Narrowband
Narrowband + RGB luminance and colour
