Just a different way to fudge the numbers. Some won't notice that the
spec is at ISO 200 rather than 100 and most won't know how to do the
numbers to convert 160 at 200 to 113 at 100. But that's an easier
conversion than trying to compare the T32's guide number of 104 at 24mm
coverage angle to someone else's guide number given at 105mm coverage
angle. It's especially difficult because Olympus also fudges the 24mm
coverage number... it's really more like 28mm as there is already 1/2
stop falloff at the edge of the field of a 28mm lens. They also just
plain lie about the guide number. I've measured 4 T32s (all within 1/3
stop of each other) and they average a guide number of 84. And, just
like the others they also fudge on the recycle time claiming 10 seconds
from a full dump. At 10 seconds the flash is still 1/3 stop away from
max power and it's still 1/10 of a stop away after 20 seconds. Never
believe a flash manufacturer's specs and always use a meter.
Dr. Flash
usher99@xxxxxxx wrote:
> This is the first hot shoe Q flash I've ever seen. They give a GN of
> 160 ISO 200----not really much different than the T32. Odd way to give
> the specs--perhaps some don't do the math. It doesn't list Oly yet as
> being supported but the Q5dR does. This requires one of their power
> packs and list the power as 150J. Some of the Q flashes seem to
> "know" what power pack they are hooked up to and the energy stored
> varies accordingly. Wonder how they do that.
> It would be nice to be able to choose max power or recycle time for the
> situation. Tim has always said that recycle times get long with 4 AA's
> with > 70 J (T32). The new Metz 58 AF-1 (from an e-mail) stores 87J
> with 4 AA's. Perhaps they take liberties on the listed "recycle time"
> as it doesn't appear possible otherwise.
>
> Dr. Flash is probably busy making sure his VueScan software is OK, so
> I'll post this now as he'll never see it.
> Mike
>
>
> http://www.newsletter.qtm.com/index.php?mnth=200810
>
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