Quote:
Originally Posted by Paul Haese
Very nice Marco. The blending of the two narrowband lines with the RGB is quite nice. Some really nice magenta views. The halos around the bright stars are similar to what I was getting earlier in the year. Which NB filters are you using?
Great saturation and a lovely field of view.
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Hi Paul, thanks. I am using Astrodon 5nm for both Ha and OIII. LRGB are Baader (with Astrodon had unacceptable halos). Most of the halos are due to reflections between filters and the field flattener and filters and ccd surface. For the second there is no much to do, for the first the little distance in TEC scopes between the flattener rear lens and the filters (around 50 mm) is not helping in reducing this effect
Clear skies
Marco