Here is something interesting coming from Bastien Francois, a commercial and music video director and a reader of the blog, who has designed a small beam splitter rig to accommodate two hacked Panasonic GH1 DSLR cameras with the GH13 firmware. The idea behind the custom beam splitter rig was of course to make a more affordable solution that what is commercially available, but also to make a 3D camera rig that is lighter and smaller and that can be used not only on a tripod, but also hand-held as it weights around 4 kilograms or about 8.8 pounds.
Bastien is using a dual remote shutter for the GH1s made by a Japanese company called Inouek3D, which according to the company gets the time discrepancy between cameras down to 4 ms when shooting 50p mode. It is also interesting to note that his rig is not done with a top and back camera design, but uses a below and back camera mounting as opposed to most other professional 3D rigs. The reason for mounting the second camera on top and not at the bottom is that this gives you more flexibility to do low shots as using a high-end camcorder usually means it is also quite big in size. But with a smaller GH1 camera it is not a problem to mount it at the bottom and mounting on the bottom also helps in not getting so much light reflected in the splitter mirror as well as makes it harder for dust and other unwanted particles to stick on it.
On his blog, Bastien has some early design photos of the DIY 3D rig as well as some more recent shots with some upgrades as well as additional information about the rig. There are also two sample videos that show how well the rig is working, so you should also take a look at these. They are available on YouTube 3D, with the first one being in 720p resolution and the second one in 1080p.
And if you are interested in the rig, then you are welcome to ask questions…