NGC6960 and Pickerings Triangle. This image was taken on three separate evenings because the constellation of Cygnus was low in the western sky setting with only about one hour of imaging time. I was using my 4 inch f/6.3 refractor, a Vixen Atlux mount, PHD auto guiding, Astronomik narrowband and RGB filters and an Atik 383L mono CCD camera. I captured five minute sub frames with matching dark frames and combined them with flat field and bias frames to reduce the effect of noise and vignetting in the final image. The total exposure time for each filter was 60 minutes using a H Alpha filter, 40 minutes using an O111 filter, 35 minutes using an S11 filter and ten minutes using each RGB filter.
RGB image
Bi-colour image
Hubble Palette
