>>Of course, if I could remember how to calculate aperture with
>>these things maybe I could use these bulbs up someday.
>
> guide No./distance to subject= F/stop.
>
> A Guide No. should be located somewhere on the side of the boxes of
the bulbs.
> Have an old Honeywell Folding fan flash myself, but no blubs to try
it out.
yeah, I know, but the GN changes with shutter speed on flash bulbs,
which makes things a little more conplicated.....
Be seeing you.
Dirk Wright
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