**Note**
If you have the in-camera-noise-reduction on, you will to set the delay between exposures to compensate for the camera's operation.
i.e for a 1min exposure, delay until next shot must be 2mins (at least) to cope with the 1min exposure time plus the 1min in camera dark removal - I add 5 secs on the time for safety.
Hope that's clear!?
Doug
ps...you can set exposures up 99mins99secs with the EOS utility, memory card capacity being a limiting factor though!
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