You're going to have a blast. I do a lot oflong exposures (timelapse photography with 180-degree shutter). One of the difficulties you may encounter is infrared contamination in the form of reduced contrast and shifted colors. Normal ND filters only block visible light, so a 10-stop ND filter increases the amount of infrared light by 1024 times! Normal amounts of infrared are easily blocked by the sensor's IR filter, but at some point it's not enough. The only solution I know of is to use "hot mirror" and other IR-blocking ND filters which unfortunately cost quite a bit more than regular ND.



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