I'd tend to mostly use wide angles but I'd imagine almost anything would suffice, although obviously a long lens is going to show just a narrow piece of the sky. I do a lot of night photography but its not specifically star trails, although the stars are almost always visible in the sky/background. If I was using my Nikon F I'd probably try my 20mm/f3.5 or 28mm/f2.8 Nikkors on it.
Originally Posted by narsuitus
When I have to leave a camera in a remote location for an extended period of time, I prefer to use an inexpensive camera that I can afford to lose.
I was reading an account of a guy who set up to do a very long (like, 4+ hours) exposure at California's famous Tehachapi Loop. He said people often asked if it was dangerous... Coyotes, snakes, etc in the dark (this was back in the 1950s). His response: No danger at all - I opened the shutter, then jumped in my car, drove into town and caught a movie!
Nikon S2, S3, F, F2, F3, FM2, FA, N90S, D80, D7000, D750, Sony a6000, Canon IIf, Leica CL, Tower type 3, Zorki 4, Vito B, Perkeo II, Rollei 35....