[allan gould]

I wanted to see if I could do narrowband imaging with my 20D during full moon and light pollution of brisbane and also see if I could synthesise the missing 'green' colour using Carboni's tools. Bear in mind this is just a very quick exercise to see if it was possible. The Ha filter I used is the Lumicon Ha which does NOT have an IR cut off and thus with the filter in the 20D gives about a 30nm bandwith. The OIII filter was a Baader filter. I did 3x300 sec exposures for each filter - obviously not enough data for a serious photo and took no darks at all or flat frames etc. Imported the stacked frames into PS and aligned them and then synthesised the other chanel. Its obvious that a colour shot can be done using just 2 filters and the light pollution easily combated. The photos were taken with a WO 80mm Apo.