Is this what I need for some star trail photos?

Started 4 months ago | Discussions thread
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jam3sd121
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Is this what I need for some star trail photos?
4 months ago

http://astrus.bymac.org/

I just bought a Sony Nex 6. I'm planning to go camping with my girlfriend in three weeks in an area that I expect zero light pollution and want to try out some star trail photos.

If I understand correctly, to make star trails the easiest way (I'm simplifying this obviously) is a bunch of long exposure shots stacked together, like 5minutes each exposure. This can't be done unless the NEX 6 is in bulb mode, and even if you use the sony time lapse app the longest you can get is 30seconds (bulb mode not supported.)

My question is, is this item the Astrus the cheapest method? Or can I actually do this with a multiple 30 second exposures?

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