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Saturday, May 21, 2011

Wide field vs closeups, Soul Nebula, IC1848





I have shot many targets with several focal lengths. 
Due that, I will publish some older images as an image sets, with different field of view and detail levels.
The fractal nature of our universe stands out nicely by this way and it will make the orientation more easy.


Many times, it's difficult to understand the image scale of astronomical images.
Due that, I will add a Moon circle in some images to show the angular scale in a sky. 
The full Moon has an angular scale of ~30 arc minutes in a sky, that's equal to ~0,5 degrees.




Image is in HST-palette, (HST=palette used in Hubble Space Telescope images)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
NOTE. The size of the full Moon (0,5 degrees) is marked as a gray circle at upper Left corner. 


A wide field image of the area, covering about 5 degrees, ~300', of the sky. 
(Ten full Moons side by side)

Two main objects can be seen in the image:
IC 1805, the "Heart Nebula", locates at upper Right.
IC 1848 can be seen at lower Left.

Image is shot with a Canon EF 200mm f1.8 camera lens and a QHY9, a cooled astronomical camera.
Baader narrowband filter set, total exposure time was ~1,5 hours (A very fast lens was used!). Original Blog post can be found HERE.


Closeup of IC 1848, the "Soul Nebula"

NOTE
The size of the full Moon (0,5 degrees) is marked as a gray circle at lower Right corner.
Image is shot with a Tokina AT-X 300mm f2.8 camera lens and a QHY9, a cooled astronomical camera.
Baader narrowband filter set, total exposure time was ~5 hours . Original Blog post can be found HERE.



Longer focal length images of the "Soul Nebula"


NOTE
The size of the full Moon (0,5 degrees) is marked as a gray circle.
This detail can be seen, in wider field image above, just left from the center of the Nebula.

A long focal lenght image of Soul Nebula, covering little over 0,5 degrees, ~30', of the sky vertically.
(Full Moons size)

Image was shot with a Meade LX200 GPS 12" telescope @ f0.5 and a QHY9, a cooled astronomical camera.Baader narrowband filter set, total exposure time was ~8 hours. Original Blog post can be found HERE.









NOTE
The size of the full Moon (0,5 degrees) is marked as a gray circle.
This detail can be seen, in wider field image, at lover Right corner of the Nebula.

A long focal lenght image of Soul Nebula, covering little under 0,5 degrees, ~30', of the sky horizontally.
(Full Moons size)


Image was shot with a Meade LX200 GPS 12" telescope @ f0.5 and a QHY9, a cooled astronomical camera.Baader narrowband filter set, total exposure time was ~2,5 hours. Original Blog post can be found HERE.

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