Sunday, January 20, 2008
Horsehead nebula
I just found this data from my hard drive.
I shoot this one 25.12.2007, only 1,5 hours of H-aplha light 900s subs.
Very bad seeing, stormy and target was only about 15-20 degree
from horizont.
Lx200 f6.3 + QHY8 + Baader 7nm H-a filter.
Guiding SXV-AO (helpped somehow with extremy bad seeing)
Friday, January 18, 2008
Elephant trunk Nebula, reprocessed
I did this object again from the scratch.
H-alpha blending to the RGB-data was not too good in ealier version.
This time the method was:
R-channel = Ha80% +R
G-Channel = as it
B-channel = Ha15% +B
+
Ha luminance 49%
After this I added some saturation and use the Ha luminance again with 40% opacity+Color balancing. This method is similar to LLRGB method, where luminance data is used twise.
From the Ha data i used only the first 4h and skip the last 2,5 hours, becouse the later data
was effected by strong wind and bad seeing. Partly for that the stars are much tighter.
Active optics was used for both, Ha and RGB, datas.
Bubble reprocessed
This is a last reprocessed Bubble nebula, I promice.
From the scratch this time.
H-alpha luminance and RGB combination is more complicate, than I tought.
80% Ha >R-channel, 15% Ha > B-channel and G-channel 0%
Ha R-channel then used as luminance with 25% opacity.
2h RGB with UHC-s
4h H-alpha 7nm
More natural appearance this time, I think.
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