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Re: Second Light (fwd)
---------- Forwarded message ----------
Date: Fri, 24 Jul 1998 11:14:20 -0600
From: "D.C. Cox" <DR.RESONANCE-at-next-wave-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Second Light (fwd)
to: Mark
The secret to capturing "arc-waves" is to use a longer exposure as you
discovered, but another factor creeps in as well. For the best "arc waves"
use a ground rod that is completely vertical and rises from a horizontal
plane equal to height of the Tesla discharge terminal to approx 3-4 feet
above this horizontal plane. Then the arc will strike the nearby vertical
rod and quickly rise upward to produce the wave effect. We use a camera
setting of f2.8 with larger coils, f1.4 with smaller coils, and then use a
time exposure of 4 seconds on most all of our shots. You hit the right
exposure times -- now just add your vertical rod for spectacular photos.
DR.RESONANCE-at-next-wave-dot-net
----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: Second Light (fwd)
> Date: Thursday, July 23, 1998 9:53 PM
>
>
>
> ---------- Forwarded message ----------
> Date: Thu, 23 Jul 1998 16:18:06 +0900
> From: Mark E Finnis <mefinnis-at-medicine.adelaide.edu.au>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: Second Light (fwd)
>
> At 22:20 22/07/98 -0600, you wrote:
>
> >Mark, a pictures always worth a thousand words. Nice pics. I'm
especially
> >interested in your camera's shutter speed. I see you've captured the
infamous
> >arc waves (anyone know what I'm talking about here? is there a term for
> the arc
> >showing multi-positions with the same arc formation?).
>
> Exposure varied from 4-6s. Didn't write down what was what ...... just
> took a whole roll & hoped like hell some would turn-out OK ;-)
>
> Cheers,
> Mark
>
>
> _________________________________________________
> Mark Finnis
> Staff Specialist, Intensive Care Unit
> Royal Adelaide Hospital
> <http://www.health.adelaide.edu.au/icu>
> Ph: +61 8 82224000 Mbl: 041 2324268
> _________________________________________________