[Merlin66 (Ken)]

As an other option, AstroPlanner has a wonderful script (DSLR Shoot) which allows multiple exposures and GOTO control. This allows you to set up the DSLR and nominated objects, press goto and it does the rest; can slew to the object, take multiple exposures ( any duration!) the quickly move on to the next selected object and repeat. Great for mosaics and comet/ Supernovae search.