PDA

View Full Version : Some thoughts... (star trails)


bafile
12th of November 2005 (Sat), 01:39
Okay, so I have been trying to get star trails in my night sky pictures, I am getting the hang of it a little better now.

But, while I was sipping my Pumpkin Spice Coffee and freezing my fingers off I began to think about something, has anyone heard of something like this that already exists...?

Instead of setting SUPER huge bulb exposures, why not bump the ISO way up to capture the star light and build something that you can rotate the camera around on a central point while rotating at the same speed to create the same effect as the earths rotation to get the star trails?

Has anyone ever tried something like this before? Thoughts are appreciated!

robertwgross
12th of November 2005 (Sat), 01:56
You should be able to get that by mounting the camera on a regular pan-tilt head on a tripod, then turning the camera to point straight up. Normally on such a head, there is a control arm sticking out toward the photographer. By pushing it right or left, you move the camera. Then, get some kind of mechanism that will push the control arm at a constant rate.

---Bob Gross---