Wondering if anyone has experience with using an external intervalometer with d5100? My question specifically is. If I get an external instead of using the on board, will I be able to change camera setting between intervals? With the internal intervalometer I am forced to shut camera off, turn back on, adjust shutter speed or aperture etc. then reactivate intervalometer with several steps through. Which is forcing me to use a minimum of 10 sec intervals when trying to shoot "holy grail" time lapses. I need to get down to 3 sec. Any thoughts?