> Something pneumatic for shutter actuation might be good. This or an > electronic solution would also make mounting the cameras outside of > the cab more practical. Shutter lag is also an issue. Things happen > fast in this field of photography. Hi Alan, This site might be useful. It shows only two cameras but perhaps you can expand the system to accommodate 4 cameras. http://home.mira.net/~kiewavly/pentax_rig.html Here are some examples of mounting hardware. http://www.berezin.com/3d/twinbar.htm http://www.rmm3d.com/3d.encyclopedia/slidebar/slidebar.html http://www.rmm3d.com/3d.encyclopedia/twin.camera/norman-rebel/rebelpics.html I hope this helps, Regards, Roderick
