Are there "standard" conditions for testing flash guide numbers ? I have heard
that most guide numbers are stated for a medium sized room with light walls. I
would have thought there was a standard so that consumers could make an apples
to apples comparison between brands.
...Wayne
> 1. 91
> 2. 90
> Brian P. Huber
> >
> > Can anyone please tell me the following:
> >
> > 1. The guide number at 100 ISO based upon the flash gun's instructions /
> > data from Olympus, and
> >
> > 2. The actual guide number at 100 ISO based upon a flash meter reading.
> >
> > Thanks
> >
> > John Hudson
> > Vancouver, BC
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