Laura Halliday VE7LDH "Que les nuages soient notre Grid: CN89mg pied a terre..." ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte
Tim Tapio k4shf@k4shf.com wrote about the Atlantis/ISS picture:
Fortunately no stars in the background to mess up the exposure....
The exposures on pictures like this are typically milliseconds. Nowhere nearly enough time for stars to even start to show up.
It's also common practice to shoot hundreds, or even thousands of frames, and pick the best ones. This is easy to do with CCD cameras. It's also how people take pictures of planets nowadays: shoot a few thousand frames with a web camera, then stack the good ones, which enhances detail and reduces noise. The results from a cheap web camera (albeit hooked up to a decent telescope and mount) are better than pre-Hubble observatory photos.
We really are talking cheap here. I use a Logitech QuickCam Pro 4000 with a telescope adapter replacing the original optics. And get better pictures than what was in my high school science textbooks in the 1970s.
Laura Halliday VE7LDH "Que les nuages soient notre Grid: CN89mg pied a terre..." ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte
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