Fernando Gonzalez Gentile wrote:
> Hi all,
>
> I recall having seen here very good photos on fireworks.
> Never attempted to do so myself, but it seems that when younger I had
> planned to do so since found, lost into some photographic information, the
> following table, hand-copied from Modern Photography.
> But seems something is missing: exposure.
> Perhaps someone here could explain me what I once understood but forgot.
> I'm copying the table below:
>
> Recommended Apertures for Fireworks
> ASA 25 -> 4.5
> ASA 50 -> 5.6 1/3
> ASA 64 -> 5.6 2/3
> ASA 100 -> 8 1/3
> ASA 160 -> 11
> ASA 200 -> 11 1/3
> ASA 400 -> 16 1/3
> ASA 1000 -> 22 1/2
>
Those settings are for whatever longish exposure you choose. The
aperture settings are chosen to let each firework expose itself, leaving
a trail on the film as the bright parts move.
This is a good place for the old hat trick. Set the shutter to bulb,
cover lens with hat, open shutter with locking cable release, remove hat
when yo want to start recording flashes, recover when it seems like
enough flashes have been recorded. Not too many, or overlaps will
overexpose.
That's the old fashioned way, but still valid.
Moose
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