SBIG ST-8XME CCD Images from the Grove Creek Observatory
SBIG ST-8XME Images taken on our Celestron C-14:
Kodak KAF-1603ME Class-1 Chip. Pixels: 1530x1020 9µ
SBIG ST-8XME CCD camera with CFW-10a Filter Wheel
Optec TCF-S focuser.
Optec 0.50X NGW Focal Reducer.
Focal Length = 2,200mm. Aperture = 356mm. Focal
Ratio = f/6.2
Field of View = 14.3 x 21.5^mins.
Image Scale = 0.847^secs/pixel.
Astronomik
R G B L SII Ha OIII filters installed
Click on the Thumbnails to bring to full resolution.
The filenames in the above images, list the image details. (Right
click on image and select "Properties")
For example: ngc7599_L_2_300.jpg = Object Name _
Luminous Filter _ Binned 2x2 _ 300 second exposure
Images taken on a 12" Meade
modified LX-200:
(decommissioned)
Focal Length =
1,722mm Aperture = 300mm Focal Ratio = f/5.74
Field of View = 18.3 x 27.5^mins Image Scale = 1.08^secs/pixel
R G B Ha filters Installed
Click on the icons to bring the images to full size:
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M42 RGB |
M57 RGB |
M83 RGB |
NGC 253 RGB |
NGC2070 RGB |
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M99 RGB |
M104 RGB |
NGC4945 RGB |
M8 - Ha |
NGC5139 RGB |
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NGC1365 RGB |
NGC1851 RGB |
NGC2442 RGB |
NGC3372 RGB |
NGC5128 RGB |
Spectral Response of both a SBIG model ST-8XE
/ XME CCD camera.
12" LX-200 Images from a previous (older chip) ST8-XE Model CCD
Camera:
Click on the icons to bring the images to full size:
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M42 by Alex Shvonski
This image is a combination of many different exposures. I took 30 one
second exposures of M42, which were combined to make one clear image that was
very crisp. I then took one 30 second coloured image with each of the 3
different filters. In maxim dl, these images were first combined, then screen
stretched to attain the correct contrast. A feature in maxim dl, which is
called "digital development", then allowed me to bring out the background
light. Similarly, I used a feature called "unsharp mask" to adjust the
foreground light so that it was not too bright. Finally, I used "colour adjust"
to bring out the red of the ionization band, while keeping the green colour of
the nebula. |
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Eta Carina by Dylan
O'Donnell Dylan is the System Administrator from our ISP, Dragnet. This lovely
image taken through the BVR filter set, was the first ever attempt of using an
astronomical CCD camera by Dylan. 3 x 30 second exposures with Red, Green
and Blue filters combined in Photoshop using channels. Levels adjusted
slightly to balance histogram.
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NGC1097 by Alex Shvonski
This image is a combination of 1 thirty second exposure using an h-
alpha filter and 3 thirty second exposures with each of the coloured filters.
Before the initial images were combined, they were deconvolved to create a
sharper final image. Deconvolving is more effective in images that do not
include nebulae because it seems as though the deconvolving process distorts
the space around stars in the image (when these stars are in front of nebulae,
nebulae appear distorted.) After the images were combined the final image was
screen stretched to bring out the outer spiral arms of the galaxy. Because an
h-alpha filter was used, some HII regions within the galaxy are visibly red. |
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NGC3372 by Andrew Mattingly
LRGB (5x60s:3x30s:3x30s:3x50s) 5 x 3 mosaic of the Eta Carinae
nebula.
Camera binned 2x2. BATC-9 filter (48nm bandpass, including H-alpha line) used
for luminance layer.
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