Thanks for quick reply. That is one of the options: use standard timelaps generator a.k.a intervalometer and build a “Y” cable with hassselblad triggers… in that fashion I could trigger 2 cameras at the same time without a difference what is in the back CFV or A12 mag… that works
but… if I would to use computer with FlaxColor for example; I would have 2 problems:
a) can I control 2 cameras/backs via 2 firewire ports?
can I program Flex or Capture for any sort of interval shooting?
I would like to use one computer as a platform for this mainly because storing and multiply controls and organizing files. 1 second is 24 frames and one of timelapse’s is 30 sec, 720 frames for left and 720 for right eye… I think that I am facing approximately 12 000 frames in total… just a thinking of CF cards is giving me a headache.
Am would like to see that stereo e54!
Agreed. You must have computer based control/storage of the images. You also need the computers to provide the firewire power so that you don't loose battery power halfway through a session.
On certain platforms you could write a simple AppleScript (or work with a dealer like us that would write it for you) to tell capture one to trigger both systems based on the computers internal clock which could be made accurate within a very tight tolerance. For electronic platforms like an AFD2 or AFD3 the AppleScript could also control shutter speed to allow you to do two exposures several stops apart (e.g. 1-sec-exposure, 4-sec-exposure, wait 30 seconds, 1-sec-exposure, 4-sec-exposure, wait 30 seconds...).
Leaf shutter lenses will produce less shake and therefore better frame-to-frame registration in theory, however, in my experience a focal plane shutter will not be an issue given a sufficiently heavy tripod, which is highly advisable in any case because of other registration concerns (e.g. wind). Video-Tool-Based image stabilization routines in post will eliminate shot-to-shot registration issues provided each frame is sharp and sufficiently high enough in resolution.
A manual-stop-down lens would be helpful in reducing the part of shot-to-shot flicker induced by aperture-size-variation (though flicker cannot be 100% avoided at capture and must be addressed in post regardless). Such variation will still exist do to shutter speed variation (present in any form of shutter control - even electronic).
Or the intervelometer (e.g. The Time Machine Intervelometer) could be used to trigger both bodies.
Actually, come to think of it, an electronic shutter on a tech camera might eliminate several issue (though creating others such as maximum shutter speed). These systems have exceptional shot-to-shot consistency of actual shutter speed and actual aperture size. It would also be worth testing two H-bodies side-by-side to see how well the built-in intervelometer stays in sync between two bodies. My guess is that it would in fact hold up in time-registration quite well for several hours; however, it would need to be tested.
Like I said; you have many options. Let us know if you'd like a partner in working through them (and doing real world testing).
Doug Peterson (e-mail Me)
Head of Technical Services, Capture Integration
Phase One, Canon, Apple, Profoto, Eizo & More
National: 877.217.9870 | Cell: 740.707.2183
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