Flame, Alnitak and Horsehead
This is 'work in progress' but makes a useful (for me!) comparison with the LRGB image I posted a couple of days ago. Also it has some nice detail and effects already. Here I have used my 130mm scope with the wider formatted Atik 460EX CCD compared to the ZWO ASI174MM CMOS camera used with the 80mm scope. The image time is considerably longer than needed with the ZWO but by using specific narrowband filters I have been able to restrict the dominance of Alnitak, which in LRGB sequences will always be extremely bright. For this image I have combined H Alpha (used as luminance and red), H Beta (used as blue) and Oxygen III (used as green). For all three the colour chosen is nearest to their actual frequency transmitted.
It is 'work in progress' as I intend to leave my set-up oriented to allow me to capture further data in narrowband next time we have clear skies to combine with the data in this image to date.
Peter
Flame, Alnitak and Horsehead
This is 'work in progress' but makes a useful (for me!) comparison with the LRGB image I posted a couple of days ago. Also it has some nice detail and effects already. Here I have used my 130mm scope with the wider formatted Atik 460EX CCD compared to the ZWO ASI174MM CMOS camera used with the 80mm scope. The image time is considerably longer than needed with the ZWO but by using specific narrowband filters I have been able to restrict the dominance of Alnitak, which in LRGB sequences will always be extremely bright. For this image I have combined H Alpha (used as luminance and red), H Beta (used as blue) and Oxygen III (used as green). For all three the colour chosen is nearest to their actual frequency transmitted.
It is 'work in progress' as I intend to leave my set-up oriented to allow me to capture further data in narrowband next time we have clear skies to combine with the data in this image to date.
Peter