Summary: With this recent boom in 3d film making, I used this product in an rather unconventional way. I recently shot a thesis film in 3d using this to hold both of my cameras close to each other. Since I didn't spring for a 3d adapter for an hvx200a, I mounted two right next to each other. It was able to mount both, conveniently, but there were several design flaws. The grayish pot casted metal parts don't tighten and lock in place once the camera is mounted.
Summary: Have used this several times in the studio and repeatedly on location shooting food shots for a restaurant chain. I mount my canon on one side tethered to my laptop on the other side and the shots come up in full 17 inch color. The marketing types hone in on exactly the shot that they need and it's a win win situation. In the studio I spin the laptop around and the client gets to see exactly what I'm capturing.
Summary: This is a must-have for anyone shooting tethered to a laptop in a studio or on location. It fits onto any good, solid tripod, and is supplemented with the Gitzo GO65 laptop tray attached to one of the two supports on the horizontal bar. You add a ballhead to the other support on the horizontal bar for your camera, attach the camera to the laptop via USB or Firewire, and you're good to go.
Summary: I ordered this piece after reading Terry White's blog awhile back (A blog I highly recommend) while he was discussing shooting tethered. I wanted to try, picked up this piece and have yet to do so. However, I've found so many additional uses for this support it was well worth the purchase.From multiple camera setups and flash units, you can really do some fun - creative things with this arm.
Summary: The accessory arms from Manfrotto are solid and very professional in appearance, for tethered shooting they are fantastic, I use this with MacBook Pro 17" mounted to the right and camera mounted to the left... I love using it, the quality of manufacture is excellent as are all the other available accessory arms in this range...
Pros: Easily Adjusted, Good Footing, Locks In Tight, Robust, Smooth Movement
Summary: This bar allows for combinations of up to four cameras/flashes or three plus a table for the laptop if so desired.A must for stereo imaging but has many other uses as long as you have the kit to fit ;-)However, make sure you have a very firm tripod to take the weight of all this stuff without collapsing or falling !
Pros: four working heads, Sturdy, very reasonable price for the flexibility gained
Cons: needs a pro tripod to support all the weight., temps you to buy for kit to fill it ;-)