Sell 550ex and buy 580????

Started Dec 27, 2006 | Discussions thread
Hugowolf Forum Pro • Posts: 12,674
Re: You forgot the inverse square law

I wasn't really forgetting the inverses square law, just ignoring it and using GNs as a loser measure of power rating. The original press release apparently said "increasing the maximum Guide Number power rating by about 50 percent"

The GN increase is about 5%

As you say, I don't know if there is any way of telling the actually increase in power output, since the GN increase could simply be from more efficient focusing of the beam.

Brian A.

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