I have been experimenting with star trails over summer and have been slowly improving my images. I started out stacking longer exposures (10min) at a lower ISO but prefer the results I have been getting with higher ISO and much shorter exposures. Any advice for improving this technique is appreciated - Thanks! For this image I used ......... Canon XSi w/ Tokina 11-16mm 60 - 30 second exposures (stacked) @f2/8 - ISO 1600 err. .sorry for the C&C on the tittle, just realized this was posted in the wrong area.