If you want to take beautiful night sky pictures with your DSLR and you live between 15 degrees and 55 degrees north latitude you might want to check out OpenAstroTracker . If you have a 3D printer it will probably take about 60 hours of printing, but you’ll wind up with a pretty impressive setup for your camera. There’s an Arduino managing the tracking and also providing a “go to” capability.
The design is over on Thingiverse and you can find code on GitHub . There’s also a Reddit dedicated to the project . The tracker touts its ability to handle long or heavy lenses and to target 180 degrees in every direction.
Some of the parts you must print are specific to your latitude to within 5 degrees, so if you live at latitude 43 degrees, you could pick the 40-degree versions of the parts. So far though, you must be in the Northern hemisphere between 15 and 55 degrees.
What kind of images can you expect? The site says this image of Andromeda was taken over several nights using a Soligor 210mm f/4 lens with ISO 800 film.
Not bad at all! Certainly not the view from our $25 department store telescope.
If you’d rather skip the Arduino, try a cheap clock movement . Or you can replace the clock and the Arduino withyourself.
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颠覆式创新：移动互联网时代的生存法则
李善友 / 机械工业出版社 / 2014-12-1 / 69
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