It is possible to set the self-timer setting on a 5D to 2 secs
than the default 10sec) by using self-timer with mirror lock (and
this a Registered Setting which can be accessed quickly from the C
setting on the exposure mode dial).
this a good default way of shooting normal tripod sequences -- ie.
mirror lockup plus a short delay for the rig to settle absolutely
also good with various motorized options I would think -- for
I use a Zapshot transmitter to fire the rotation and shutter firing
one motorized head I have. One button on the transmitter fires the
camera, the other fires the rotation action. Hold them both down at
once and the camera rotates and fires shots continuously. To do stop
start (normal pano) sequences with this you have to hold the rotation
button down for a short time to rotate the camera an increment, let
it go, wait till the vibration from the rotation stops, press the
shutter firing button, wait til the exposure finishes, press the
rotation button ...etc. With a 2 sec selftimer delay this timing is
automated, so a simultaneous press of both buttons gives one a
rotation, delay, shutter firing automatically.