M16, The Eagle nebula. This image was taken on two separate evenings, 90 minutes using a H Alpha filter . ten minutes using an O111 filter, 15 minutes using an S11 filter and 15 minutes using a H Beta filter. I was using my 4 inch F/6.3 refractor, a Vixen Atlux mount PHD auto guiding, a set of Astronomik narrowband filters and a 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.
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The Eagle nebula
RGB plus Hubble Palette
