M27. The Dumbell Nebula. This image of M27 is a composition of new and old data taken on three seperate evenings . I used five minute sub frames with matching dark frames and combinded them with flat field frames to reduce the effect of vignetting in the final image . I used H Alpha as red, O111 as blue and S11 for the green , the total exposure times was 3 hours using a HA filter , 2 hours using an O111 filter , one and a half hours using a S11 filter and 30 minutes for each R.G.B. filter. A total exposure time of 8 hours.
RGB
Narrowband
Erode
Here we have the final composition of M27 the Dumbell nebula, notice the faint outer shells of gas expanding outwards. I used all of the narrowband data for the luminance and only a little RGB colour data to reveal the colour of the stars. The total exosure time was 8 hours taken over three seperate evenings.
