Thursday, October 30, 2008
Sh2-155, S-II channel added
I Managed to use two hours clear window to shot S-II
channel last night.
After that it's possible to make a real three colour narrowband composition.
Here precented as a Hubble palette, S-II = RED, H-a = GREEN and O-III = BLUE.
Imaging details are same, than in previous post,
just S-II information is added, 3 X 1200s.
Monday, October 27, 2008
Sh2-155, The Cave Nebula
"natural" color version
H-alpha
Version with reduced stars
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Last night I shot a new Sharpless catalog object, Sh2-155 in constellation Cepheus.
It's sometimes called the "Cave Nebula" doe the central formations shape,
I can't see the cave there though.
I shot three hours of H-alpha and one and half hours of O-III.
There is very litle of O-III there, but with extreme stretching of the data it was usable.
Image here is a narrowband color composition where H-alpha is Red and
O-III is Blue, Green color is synthesized from H-a and O-III channels.
There is three versions, first with "natural" colors and second with H-alpha only.
Third image is same color image but with reduced stars. The purpose of this image is
to show the nebulosity alone.
_
Imaging data:
Camera, QHY8
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Filters,
Baader 7nm H-alpha, Baader 8,5nm O-III and Baader
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Optics,
Tokina AT-X 300mm @ f2.8
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Exposures,
9X 1200s H-alpha, 4 X 1200 O-III + flats and bias
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Guiding,
LX200 GPS 12" + PHD-guiding and Lodestar
Sunday, October 26, 2008
Sh2-171
S-II, H-alpha and O-III as a Hubble palette
H-alpha, O-III, synthesized Blue as a "Natural" color
H-alpha
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Sh2-171 is an emission nebula in Cepheus.
I have shot few objects from the Sharpless catalog before, I find them interesting and
not too common as an imaging targets.
Here is three versions, first is a narrowband color version in Hubble palette,
second is a "natural" color version with synthesized green from H-alpha and O-III.
Third, black and white, is a hydrogen alpha channel only.
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Imaging data:
Camera,
QHY8
-
Filters,
Baader 7nm H-alpha, Baader 8,5nm O-III and Baader 8nm S-II
-
Optics,
Tokina AT-X 300mm @ f2.8
-
Exposures,
9X 1200s H-alpha, 3 X 1200 O-III and 3X1200s S-II + flats and bias
-
Guiding,
LX200 GPS 12" + PHD-guiding and Lodestar
Saturday, October 25, 2008
Friday, October 17, 2008
Veil Nebula, Supernova animation in stereo
This stereo animation shows the origin of the Veil Nebula.
(This time for parallel vision only, it might work for Cross Vision too.)
How to see this in stereo?
Please, look for istructions at right hand side menu.
Veil Nebula 3D + animation
Parallel Vision image
Cross Vision image
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I tested GIF-animation in previous post.
This time I use it to add litle surprise to this stereo image.
Again, two versions. One for Parallel Vision method
and the other for Cross Vision.
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Click the image to start, look at the image in stereo, after few
seconds something small going to happend.
Wednesday, October 15, 2008
Star removal technique
Star removal example animation (kilck to start)
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In narrowband color imaging star control is essential.
I have developed some time now starremoval technique.
It turned to be very accurate.
Please note, that this is a GIF-animation and image has a lower quality, than original.
Nebula in dense starfield can seen better without stars and
more faint details and large forms comes visible.
_
Images details, please, look previous posts.
Monday, October 13, 2008
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