Thursday, November 17, 2011
Cirrus of Cygnus as a stereo pair 3D
Parallel vision 3D
Other 3D-formats:
Original 2D:
NOTE! This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
Cirrus of Cygnus as an anaglyph Red/Cyan 3d
3D-NOTE!
You'll need Red/Cyan Eyeglasses to be able to see images as 3D.If you have a Red and Blue filters, you can use them! Red goes to Left eye.
Other 3D-formats:
Original 2D:
NOTE! This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
Tuesday, November 15, 2011
NGC 7000, North America & Pelican Nebulae
North America and Pelican Nebulae area
in constellation Cygnus
Wide field image in HST-palette, from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen. Note, the "noise" in background is not a noise but countless stars!
A cropped closeup to show the resolution. After countless tweaks, stars are now pinpoints from edge to edge, this lens is very sharp full open at f1.8 but focusing is more than difficult... the critrical focus zone is about 7 microns, 7/1000mm!
Canon EF 200mm f1.8 is a monster lens (fastest tele lens in the world). Total exposure time for all channels is just 4h 30min for this relative deep narrow band image, shot under a heavy light pollution.
As can be seen from the image, North America and Pelican Nebulae are actually a single emission area, divided visually to two parts by a dark nebula at front.
I have shot a narrower wide field shot from lower part of this formation, earlier in this Autumn, with a Tokina AT-X 300mm f2.8 camera lens, it can be seen HERE. Area is from just bellow the North America Nebula.
Image in Natural color palette from the emission of ionized elements,
R=Hydrogen + Sulfur, G=Oxygen and B=Oxygen + Hydrogen.
This palette is very close to a visual spectrum.
An animated image, with and without stars
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Levels, curves and color combine in PS CS3.
Optics, Canon EF 200mm camera lens at f1.8
Camera, QHY9
Guiding, Meade LX200 GPS 12" and a Lodestar guider
Image Scale, ~5 arcseconds/pixel
H-alpha 15x600s, Binned 1x1
O-III 6x600s, Binned 1x1
S-II 6x600s, Binned 1x1
Ps.
There is a tiny nebula in lower Right crner, near the "Pelican's head", if somebody knows, what it is, please leave a comment here.
It emits strongest at H-a but there are O-III and S-II bands visible too.
Update.
A friendly Blog follower just posted a comment about this nebula.
It's an emission nebula designated as a GN 20.43.9, thank you.
There is a tiny nebula in lower Right crner, near the "Pelican's head", if somebody knows, what it is, please leave a comment here.
Update.
A friendly Blog follower just posted a comment about this nebula.
It's an emission nebula designated as a GN 20.43.9, thank you.
Monday, November 14, 2011
Cirrus of Cygnus, project finalized
Cirrus like gas filaments
in constellation Cygnus
HST-palette, from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen.
A series of closeups to show the resolution, not a bad one for a 200mm camera lens...
An animated image to show some interesting structures under the star field.
Version in colors of visual spectrum
Image in Natural color palette from the emission of ionized elements,
R=Hydrogen + Sulfur, G=Oxygen and B=Oxygen + Hydrogen.
This palette is very close to a visual spectrum.
Last night I was able to finalize a three panel mosaic from Cirrus of Cygnus. I have planned to shoot this formation a long time, finally there, yahoo...
There are very few images around showing this area, it can be seen in many wide field images though but I haven't seen any images focusing to just it. This area can be seen in this APOD image Left, at about ten a clock position. This is not a bright target but by using an extremely fast, 200mm f1.8, optics a total exposure time for all three panels was very reasonable, ~7 hours.
The bright, magnitude 2.9, star at middle Left is the BSC 18 Del Cyg (HR7528). This image spans about 12 degrees horizontally (24 full Moons side by side) and it's part of large nebula complex around constellation Cygnus. "Northern Cross" nebulosities are located at distance of about 2000 light years. At lower mid Left lays the "Propeller Nebula", I shot a little narrower wide field image of it in this Autumn, it can be seen HERE.
It does look like a Cirrus cloud!
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves, color combine and mosaic in PS CS3.
Optics, Canon EF 200mm camera lens at f1.8
Camera, QHY9
Guiding, Meade LX200 GPS 12" and a Lodestar guider
Image Scale, ~5 arcseconds/pixel
Exposures
Filter, Baader 7nm H-alpha
Panel 1, 8x900s Binned 1x1
Panel 2, 4x900s Binned 1x1
Panel 3, 5x 900s Binned 1x1
Filter, Baader 8nm S-II
Panel 1, 6x300s Binned 3x3
Panel 2, 6x300s Binned 3x3
Panel 3, 6x300s Binned 3x3
Filter Baader 8,5nm O-III (I need a narrower one...)
Panel 1, 6x300s Binned 3x3
Panel 2, 6x300s Binned 3x3
Panel 3, 6x300s Binned 3x3
Ps.
A vertical composition
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