i'm curious to know what the actual output/GN from a quantum Q flash really is (T series)? i think i recall heaingr they were preatty accurately calculated by the manufacturer but havent used one. considering buying one though...
thanks
michael

check out www.qtm.com for downloadable information. GN is accurately presented. The Quantum will easily put out twice the light of a 580Exor SB800 but the flip side is it is easy to blow out subjects as it is harder to work with at distances under 8 feet.