Sell 550ex and buy 580????

Started Dec 27, 2006 | Discussions thread
Hugowolf Forum Pro • Posts: 12,674
No kidding

Were do you get the "50% effective increase in power" from? The 580ex has a stated GN of 58 metres, the 550ex has a stated GN of 55 metres (both at f/1, ISO 100, and 105 mm).

(58 – 55) / 55 ≈ 5.5%

When fired from inside a softbox, I can't consistently measure the difference with a light meter.

The 580ex is much easier to use, the interface is better, the tilt and swivel is easier, the recycle time is slightly better, and the batteries last longer.

Brian A.

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