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Dream
Astrograph - 16" f3.75 |
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sample
images taken with 3" coma corrector |
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Before going to the image to the right, be sure to
study the image and text at the bottom of this page. |
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The image to the left is single image of the Moon
taken February 16, 2008. The exposure was 0.003 seconds using
a KAI-11000 CCD chip. |
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The image to the right shows the wide field of this
16" f3.75 Dream
Astrograph. |
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Click on the image to see a page with high res, cropped
version, as well as a raw file. |
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The image to the right is a single, short exposure
taken February 16, 2008. |
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A short exposure was used to eliminate mount-induced
errors into the stars' shape. |
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Click on the image to see a page with a high resolution
jpg, as well as the raw (dark subtracted) file. Please feel free
to download the files and examine the entire field in Photoshop
at 400-500%. Other than a contrast adjustment, no other image
processing has been done to the files. |
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"Hi Shane,
Congratulations! I am most impressed with the image. My comments:
1. Good image sharpness throughout the entire frame.
2. Complete lack of coma, edge to edge.
3. Consistent focus centre to edge.
4. Some vignetting on corners.
5. Excellent PSF as seen on the brightest star.
6. Terrible light pollution!
7. Excellent Gaussian distribution when examined at 400%.
8. Is the image fully focused?
Thanks" |
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Frank R., Elektra Observatories - 1m client |
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More images will follow as test out
continues. |
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