Trying to figure out how to get beyond the 30-second max time exposure on my camera. It doesn't have the bulb setting. Otherwise won't be able to get the pix.
Be aware that with a standard 50mm f.l. lens on a 35mm SLR, you can take a time exposure of no more than about 60 seconds without the celestial objects "trailing" on the film (or CCD) due to the rotation of the earth. Shorther focal lengths = longer exposures without trailing, at the expense of smaller image size of the object.
Hope that helps.