Re: [photo-3d] flash with twinned cameras

[William Gartin <william_gartin@xxxxxxx>]

on 2/27/01 10:50 PM, Peter Davis wrote:

>> Rather than try to synchronize and risk one camera having full
>> flash of it's own plus a partial flash from the other, should one
>> mount two flashes side by side off to one side on a flash bracket
>> and deliberately stagger the camera release by about a half second
>> and hope for little movement by the subjects.
> 
> The major drawback to this is that the two images will have different
> lighting, due to the use of shadows.  In this case, the shadows are almost
> guaranteed to change between frames, even if nothing else does.

What would be the drawbacks to making some kind of "Y" PC cable, with one
flash unit plugged into both cameras. The flash I use (SB-16) has a reduced
power motor-drive setting which let's it take up to 8 frames in continuous
shooting mode. If the cameras were off, would each camera fire the flash for
its own correct sync? Assuming this would work, the only lighting drawback I
can see is if the cameras were close enough that the flash fired again while
the first shutter was still open. Anyone tried something like this?

Otherwise, I think using two flashes is going to cause problems with light
source angles between the two sides, although the soft-box could mostly
aleviate that.

Also, how close can you expect the shutter sync to be if using a single
button to trigger both cameras, assuming electrically fired shutters
(modifed FE2's)? Is it exact, or at least close enough?
 -- 
William Gartin <william_gartin@xxxxxxx>



 

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