Phil, you could also try usb + serial remote. If you don't have a serial adaptor I can send you one...have a couple of spares. It'll take about 2 or so seconds to update the shutter via usb. Camera is triggered via remote, so time between shots is 1s or a bit less for constant shutter + fast card.
Edit: Just to clarify: You can update the shutter setting (or ISO) via USB and fire the shutter via the serial remote. Fred B made this change for my project... not sure if it's documented though. You can also use bulb below 1/30 s for faster turn around.
Last edited by colinmlegg; 13-10-2012 at 11:45 PM.
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