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06/28/2007 01:08:49 PM · #1 |
Unbelievable resolution in this shot. Taken from a satellite tracking ground station with a sweet scope:
Astro Pic of the Day
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06/28/2007 01:14:37 PM · #2 |
| That is quite amazing the detail taken from the ground. I'd love to have that scope. :) |
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06/28/2007 03:37:41 PM · #3 |
| I wonder how they got enough light to use a video camera? I thought the shutter speed ranges were pretty limited on those, but maybe it's a high end one. |
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06/28/2007 03:46:20 PM · #4 |
Originally posted by MadMan2k:
I wonder how they got enough light to use a video camera? I thought the shutter speed ranges were pretty limited on those, but maybe it's a high end one. |
Last i checked none of my video cameras have an actual shutter. The 30 frames per second comes from cycling. You keep bringing this cnecpt of a shutter up wtf is it your talking about. |
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06/28/2007 03:59:29 PM · #5 |
Originally posted by MadMan2k:
I wonder how they got enough light to use a video camera? I thought the shutter speed ranges were pretty limited on those, but maybe it's a high end one. |
It's a very large aperture telescope and good video cams have the ability to amplify the signal to compensate for low-light situations. I don't think it said it or not, but I'm guessing they used "frame stacking" too, where you take a few dozen (or more) frames from the video and combine them to form one high quality composite. |
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06/28/2007 04:01:58 PM · #6 |
I am not an expert on this subject, but my neighbour Brian, who I have spoken about before on here, uses his Canon 20D for stills, his Sony and Canon video cameras for video astro work.
The video cameras give very good sharp still frames through his Takahasi? scope. Hope I spelt that right! |
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06/28/2007 04:02:04 PM · #7 |
Originally posted by MadMan2k:
I wonder how they got enough light to use a video camera? I thought the shutter speed ranges were pretty limited on those, but maybe it's a high end one. |
Remember that the ISS was in full sunlight, and like any fully sunlit object it is quite bright. |
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06/28/2007 04:12:31 PM · #8 |
| Oh, I didn't think about the stacking thing. I guess that makes sense, and especially if it was sunlit. |
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06/28/2007 05:38:00 PM · #9 |
I'm not sure how this was done for the Space Station photo but my STV CCD video camera has a best frame function. It will just keep on taking pictures on and on and only updating the image when a better picture is achieved. This picture of Saturn was the best frame in the 30 mins the camera was on. It was taken using an 8 inch Mead LX200.
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