Elephants Trunk (SHO/bi-colour)

This image represents an attempt to obtain natural looking star colours with only narrow band data. It consists of the traditional SHO pallette, modified with the Bob Franke adjustments. Whilst this yields pleasing colours on the Trunk, the purple star halos, which also penetrated into the nebula did not look natural. I therefore parked this result and tried a bi-colour (HOO) approach. In my opinion, this led to less attractive Trunk colours but more naturally coloured stars. I blended the two results in an attempt to get the best of both approaches.

LIGHTS: Ha:12, OIII:16, SII:8 x 1800s. DARKS:30, BIAS:100, FLATS:40 all at -20C. Taken with an Esprit 150.