Lee,
Have you considered using slave units as remote triggers? A T-20 with the
slave sensor facing your shooting position (even if you had to use a mirror
to the the angles right) and the output facing the inside of the dome could
detect a flash on your camera. I suspect you are far enough away that the
output of the camera mounted flash would have almost no effect in lighting
the scene, but it should trigger the slaved flash, which would in turn
trigger any other flashes strategically placed within the dome. Such a
setup would be very portable to any location and would produce predictable
results with only modest calibration.
John P
-----Original Message-----
From: R. Lee Hawkins <lhawkins@xxxxxxxxxxxxxxxxxxx>
To: olympus@xxxxxxxxxxxxxxx <olympus@xxxxxxxxxxxxxxx>
Cc: lhawkins@xxxxxxxxxxxxxxxxxxx <lhawkins@xxxxxxxxxxxxxxxxxxx>
Date: Wednesday, March 25, 1998 7:43 PM
Subject: [OM] Radio flash triggers.
>
>Hi all:
>Recently I've been taking pics of our observatory from the roof of the
>adjacent science center, in order to get some "bird'-eye-view" shots.
>I'm doing this with the domes open and the telescopes pointed toward my
>camera, and with the 1000mm (500/8 + 2x-A) and 500mm shots I'm spot
>metering in and outside the dome (inside the domes is dark, the outside
>is bright white).
>
>Now, it'd be nice to have some radio-controlled flashes that would go
>off when I fired my camera from the roof. I've calculated the one-way
>light travel time, and it is ~100x shorter than a 1/1000 sec flash
>duration. These wouldn't need to be TTL flash, since all they would be
>doing is lighting up the interior of the dome while the shutter is open.
>I could play around with apertures to get the exposure right.
>
>So... does this sound totally silly? Anyone done anything like it
>before? Anyone know how cheap radio controlled flash triggers are?
>(I've got a slew of T-20's and a T-32 I can use for this project).
>
>
>Thanks in advance!
>
>Cheers,
>--Lee
>________________________________________________________________________
>R. Lee Hawkins lhawkins@xxxxxxxxxxxxxxxxxxx
>Department of Astronomy lhawkins@xxxxxxxxxxxxx
>Whitin Observatory http://www.astro.wellesley.edu/lhawkins/lee.html
>Wellesley College Ph. 781-283-2708
>Wellesley, MA 02181 FAX 781-283-3667
>________________________________________________________________________
>
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