[ozstronomer (Geoff)]

Hi All,

I have seen some great Bi-colour Narrowband images on the forums so I've decided to give it a try.

This is 2 hrs of Ha and 3.5 hrs of OIII. Frames have had darks and Flats applied.

The Ha nebulosity is prominent but the OIII doesn't appear to have added anything to the overall image except to add a blue cast.

The attached screen shot shows the layers. Hue/Saturation is as follows.

Ha H=0, S= 100, L=-50
1st OIII H= 133, S=100, L=-50
2nd OIII H=240, S=100, L=-50

The image I have seen of NGC 6188 has the OIII really adding to the Ha and giving it extra depth. maybe this is just the wrong target?

Any help or suggestions gratefully appreciated

Thanks Geoff