Other factors to take into consideration include film versus digital, at what stage e.g. Full Moon (less exposure time, obviously), partial phase (slightly more), and totality (almost double your full lit phase). Sure, it will last long enough that you can take multiple exposures during the course of the event, then just keep the good ones when you're finished!
Seanie.
Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
  