sderamus:

The Earth (i.e. the sky) rotates at the rate of 15 arcsec/sec. If you do a 30 second exposures, the sky motion is 15*30 = 450 arcsec. Your Canon, assuming it is a 350D or equivalent) has 6 micron pixels. The kit lens has 18 mm focal length, i.e. the pixel scale is about 6/18000 = 68 arcsec/pixel. Without a tracking tripod your 30 second exposure will smear each star over almost seven pixels. This is too much for sharp star pictures and too little to call it star trails. For openers, forget the telescope and mount your DSLR on a solid fixed tripod. If you expose at f/3.5 and iso400 for about 10 seconds, the stars will be elongated by only 2 pixels, which is good enough to learn. Don't forget to use the selftimer. Even a single exposure from a light polluted sight will get nice constellation pictures. Stacking a dozen using software will be the next step. Then go to longer focal length and the need for a tracking tripod (not just a wedge, but a wedge with a RA drve motor) will be obvious.

hha