First of all, there really isn't anything called heat lightining. It is a
misnomer lightining from a distant storm that is hidden by the haze in the
atmosphere. The haze will light up, but because of the distance to the
storm there isn't any thunder. Heat doesn't cause lightining.
There is a company selling a "lightining trigger" for cameras. Best as
I've been able to ascertain, it is a couple flash-slave sensors tied to an
amplification circuit which then completes a circuit closure. I'd buy one,
but at $250 is seems a bit pricey when I think I could build one for $20.
The lightining trigger is designed to trigger the camera's shutter upon the
flash of lightining. They recommend a shutter speed of around 1/2 second
with appropriate lens opening for the scene. This is great for daytime
lightining shots.
If I ever get around to building up a prototype that works I might have a
buddy manufacture a few and sell them for a more reasonable price. It
would connect to the winder or motor drive remote.
But first there is this small thing called money...
Ken Norton
ps. here in central Iowa we sure have gotten our fair share of supercells
this year. Just how many tornado warnings can an area have in one year?
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