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**[email protected]** · December 22nd 07, 02:04 AM posted to rec.photo.digital.slr-systems

On Fri, 21 Dec 2007 23:07:16 +0000,
(D.M. Procida) wrote:

I'd like to try taking photographs of such things as drops of water, or
exploding balloons.

What would you use to capture this with a digital SLR (in my case, a
Pentax K100)?

Thanks,

Daniele

First, you need a cable remote release for the camera, and have someone check
how the contacts work, so you can use a relay.

Once you have determined that "dry" contacts can trigger the camera, you need an
audio activated switch. ("dry contact" refers to no foreign voltage present on
the contacts e.g. = a switch.)

There may be a kit available, such as the "clapper" lamp controller, or if you
can get a sensitive AC relay, you could use any audio device with a microphone
and speaker or headphone out.

You could ask on the electronic groups if someone can help you, or even build
you something.

I myself would buy a small amp kit, just a few watts, maybe from Canokit, and
fit it with a microphone and low voltage (6v) AC relay, and hook it up to a
cable release. Cost maybe $50 or so complete. You need an amp with mic
capability or the sound would have to be too loud. For a mic you just need any
cheap 'toy' you can find - else you could pay a lot!

Unfortunately, for water drops, you would need a very very good audio system!
(unless they fall on a drum!)