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Off Topic / Re: Astrophotography
« on: May 27, 2008, 14:52 »
As Bateleur said with such lens you are going to see blur due to Earth's rotation even on relatively short exposures. Without a tracking equatorial mount you might be limited to the moon. You could maybe try to stack a bunch of short exposures to avoid star trails.
Let us know how it goes
EDIT:
you might want to look up some information about barn door drive - it's a simple tracker that can be made with some spare wood and tools. Can be motorized or not.
I have this link in my bookmarks: http://hometown.aol.com/Davetrott/page17.htm
I don't know if such setup would be feasible for a heavy 500mm lens thou.
Let us know how it goes
EDIT:
you might want to look up some information about barn door drive - it's a simple tracker that can be made with some spare wood and tools. Can be motorized or not.
I have this link in my bookmarks: http://hometown.aol.com/Davetrott/page17.htm
I don't know if such setup would be feasible for a heavy 500mm lens thou.