Stayed out until 4AM last night traipsing around Arches National Park with my photog friend Charlie. For this shot he let me borrow his 5DMkII with the 16-35L lens - full frame, ISO 3200 at f 2.8... Holy moly!!
I did the light painting with my 580EXII strobe, gelled with 1/4 CTO and shot through a big long snoot to try to keep spill off the plants in the foreground. Had the flash set at 1/4th power and popped it off about a dozen times across the rock face.