Remember long exposures chew batteries, so all night time lapses may still exhaust the usual 2 batteries in the grip over a couple of hours. My comments are based on experience with a 350D, although the batteries were getting a bit old.
I've worked out how to improvise a 12V power supply with my Nikon, so I should be able to run the camera, dew heater and EQ-3 mount from a 20 amp/hr battery for the night.
DT
Last edited by DavidTrap; 14-02-2012 at 12:37 PM.
Reason: Clarity
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