NGC6888

These images of NGC6888 was taken on two seperate evenings. using R.G.B. and narrow band filters HA, OIII and SII . I was using my ten inch f/4.8 reflector an Atik 383L mono CCD camera and PHD auto guiding. 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 time was 40 minutes for each RGB filter, 60 minutes using a H Alpha filter, 30 minutes using an OIII filter and 30 minutes using an SII filter.