This is covered in the technobabble of the show. The gate is one way to anything bigger than radio waves, so the camera would see nothing until enough of it had dematerialized for the rest to be sucked through.

The camera wouldn't emerge through the other side until the whole pole is through though, the Stargates only pass matter to the other end once the full object has entered.

As others have explained, this is covered, the Stargate creates a minuscule wormhole, all matter is disintegrated transported and then reintegrated. But the Stargate acts in continuous chuncks of matter, so the camera won't rematerializes until the entire stick crosses the event horizon, so you would need to attach the camera to a remotely controlled car, and you're back to the robot.