http://www.dpreview.com/articles/54...uration-for-the-price-of-a-normal-hotshoe-gun
This is an interesting Kickstarter project. It's an LED flashgun that produces 1M lumens for 1/2,000,000s. Guide number is 1.5m at ISO100 which is extremely weak, but they claim that the peak lumen output is higher than a regular flashgun (which I'm not so sure about), and the short duration makes it better for freezing motion.
This is an interesting Kickstarter project. It's an LED flashgun that produces 1M lumens for 1/2,000,000s. Guide number is 1.5m at ISO100 which is extremely weak, but they claim that the peak lumen output is higher than a regular flashgun (which I'm not so sure about), and the short duration makes it better for freezing motion.