This is a false color image of the Sh2-240.
Image of the object with no stars was added as lighten mode to the Red channel,
under PS.
Image of the object with no stars was added as lighten mode to the Red channel,
under PS.
h-alpha image.
This is really difficult target!
I can see effects of light pollution here, even with 7nm H-a
filter. Bad gradients etc...
This time I shooted 4 X 3600s = One hour subs!
My record so far. Longer subs are needed to bring out very
faint structure of this object.
So far there is about 7h exposures, I thin an other 10 hous is needed here.
I'll shoot more when weather allows.
Inverted version
This is a version with no stars (image processing trick)
to bring out the structure better. This image was used to make a false color image.
This is really difficult target!
I can see effects of light pollution here, even with 7nm H-a
filter. Bad gradients etc...
This time I shooted 4 X 3600s = One hour subs!
My record so far. Longer subs are needed to bring out very
faint structure of this object.
So far there is about 7h exposures, I thin an other 10 hous is needed here.
I'll shoot more when weather allows.
Inverted version
This is a version with no stars (image processing trick)
to bring out the structure better. This image was used to make a false color image.
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