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The barn door tracker is basically a device that lets your camera (or telescope, etc) follow the stars as the Earth rotates. The double-arm barn door tracker is an improvement on the design to eleminate tangental errors as the arm opens so the sky can be accurately followed for up to 2 hours without stars "trailing," offering the ability to do some long-exposure astro photography. They're supposed to be a great alternative to the $$$ sky/star tracking platforms since they're fairly easy to build for cheap.
That said, has anyone here built one? ( http://education.jlab.org/tracker/index.html )
I'm building my own right now. (The Double Arm Type-4 w/ beta=2.186) I'll hopefully post pics of it and with it after I can get ahold of a jig-saw for some final cuts...
Just wondering if anyone else here has built one or knows something about astro photography. Cheers.
That said, has anyone here built one? ( http://education.jlab.org/tracker/index.html )
I'm building my own right now. (The Double Arm Type-4 w/ beta=2.186) I'll hopefully post pics of it and with it after I can get ahold of a jig-saw for some final cuts...
Just wondering if anyone else here has built one or knows something about astro photography. Cheers.