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That's called image-stacking and is very popular amongst astronomers for taking more conventional shots. They often use a webcam on the back of a telescope, but they aren't normally looking to make artistic trails so each image will be automatically offset so they stack correctly, in combination with auto-guiding of the scope if they have it. A friend of mine started with a modified Philips Toucan on the back of his scopes (6" and 8") and graduated to an EOS 400D.FT.
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Start 1:13:12 AM
Finish 2:27:14 AM
I probably could have let the camera stay out there longer but i was being impatient.
Looks like i was in the flight of a UPS plane, they fly over my house all hours of the night.
the horizontal lines on the bottom left though.. thats another storyLast edited by Lizzard[MPE]; 22 April 2008, 02:19.
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I once made a 30s exposure of a fountain in front of a church; camera was also set to apply noise reduction (darkframe subtraction). About 10s fter having pressed the shutter button, a tourist walked in front of the church, aimed his camera at the fountain (and at me), and FLASH...
Had to wait 20s for that exposure to finish, then another 30s for the dark frame subtraction, then another 10s for the operation to finish...
All part of the fun...
Jörg
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