[amsat-bb] Re: Amazing image captured 2 miles from my house

[laura halliday]

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 at 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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