I just purchased a couple AB 400’s, and I wanted to see a real life, light output, comparison between the Canon 580EX II, and the AB’s. I shot the below shots mid day, sunny, in the shade. I metered without strobes, and set the exposure at -2 stops (ISO 200, F13, 1/200, 16mm lens), and then set the 580EX II at 1/1 (on manual), and full power on the AB 400’s. I stood approximately 12′ – 15′ away from the strobes. All strobes were lined up side by side.
Here we go…
Here’s the Metering shot, set at -2:
Here’s The AB400 with the stock 7″ reflector. Again, set on full power:
Here’s the 580 EX, set 1/1, zoomed at 70mm (I know this isn’t really an apples to apples comparison to the 7″ AB reflector, but… it still gives you a good example of output:
Here’s the AB 400 with the Long Throw 11″ reflector:
Here’s two AB 400’s. One with the 11″ long throw reflector, and one with the stock 7″ reflector: