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budguinn
Founding Member Platinum Level
Gallery: Latest Photos
Registered: Aug 2003
Location: Gold Beach, Oregon
Posts: 394
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Comet Bradfield...in Fastar Mode
Hi everyone,
I took this of C2004/F4 Bradfield yesterday. C8" ultima 2000 Fastar on a CGE mount.
This was 20pics@1min acquired and processed in AstroArt3 and PS7.
Camera is the Starlight SXV-H9C.....this is one of my first real uses of this camera in the Fastar mode.
I processed it, and took such long exposures to bring out the tail detail.
comments are always appreciated.
warmest regards,
PS.......I should explain "FASTAR". My Celestron has a secondary mirror...this is a SCT 8"....Celestron has made a lens assembly that replaces the secondary mirror and changes the scope from an F10 2000mmFL to an F2 400mmFL scope.
This makes the scope extremely "fast" and gives about 5 times the FOV. Only a few cameras will work in the Fastar mode because the camera is placed in the front of the scope and does work as an obstruction in the light path. My new camera is such that it doesn't obstruct that much, however.
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warmest regards,
Bud Guinn
Nikon 5700
http://www.budguinn.com
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Apr 27th, 2004 03:22 PM |
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RVB Pix
Administrator
Gallery: Latest Photos
Registered: Jun 2003
Location: Scotland - France
Posts: 1781
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Like it a lot... and in colour, too.
What I don't understand in the photo is how you can have the comet without any blur from movement, but the stars in the background have a slight movement. Is this done in the post processing stage ?
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Kind regards
Stephen
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May 2nd, 2004 09:04 AM |
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budguinn
Founding Member Platinum Level
Gallery: Latest Photos
Registered: Aug 2003
Location: Gold Beach, Oregon
Posts: 394
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quote:
Originally posted by RVB Pix
Like it a lot... and in colour, too.
What I don't understand in the photo is how you can have the comet without any blur from movement, but the stars in the background have a slight movement. Is this done in the post processing stage ?
RVB....this is a really good question. The comet is moving very fast, in relative terms, to the stars. With the scope tracking on the neucleus or core of the comet it will see it as moving through the star field.....thus the star trails. If I had guided on the stars then you would have seen a blurrier comet with the stars tight-n-bright.
I'm shooting this comet again right now...and going to try to get the "T7" comet after this.....this is the first real morning since I posted this picture that I've been able to image again with no haze/moisture...
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warmest regards,
Bud Guinn
Nikon 5700
http://www.budguinn.com
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May 2nd, 2004 01:36 PM |
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RVB Pix
Administrator
Gallery: Latest Photos
Registered: Jun 2003
Location: Scotland - France
Posts: 1781
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Thanks for taking the time to explain.... look forward to seeing more like it.
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Kind regards
Stephen
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May 2nd, 2004 01:48 PM |
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