these were taken at f8, iso 100, 25 seconds shutter, through the 35mm f1.4L , with the singh-ray vari n duo filter dialed all the way to max, now that's advertised as 2-8 stops, but max is more like 6-7. i had tried 30 seconds on the first 2 shots, but they were a little too hot for my tastes, so i backed the rest of the show down, 15 and 20 seconds were a little too dark for any globe , so i settled on 25, seems to be about right. at least for that location, probably would be right for anywhere around world showcase lagoon. the further away from the bursts, the longer times you need. my wishes shots needed 30 seconds. and i definitely need that cable release that haunteddoc has, it's that electrical one that allows you to set up shutter times, with continuous frames, i lost about 2 seconds between each shot as when the shutter closed i had to manually hit the button to start the next one.