Garry Lewis added:
> >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.
>
> Of course with those OTF readers you shouldn't need to figure F/stop. Just
open the lense, set off the flash, and let the camera read the light.:-)
>
But with OTF you still need a way to quench the light. Flashbulbs don't
know how to do that.
Gregg
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