A gimbal is a pivoted support that allows the rotation of an object about a single axis. A set of three gimbals, one mounted on the other with orthogonal pivot axes, may be used to allow an object mounted on the innermost gimbal to remain independent of the rotation of its support (cf. vertical in the first animation). For example: on a ship, the gyroscopes, shipboard compasses, stoves, and even drink holders, typically use gimbals to keep them upright with respect to the horizon despite the ship’s pitching and rolling.
So, when it come to arial photography area. It’ll help to level camera to desired angel and stay like that all the time.
I’ve use servo-type camera gimbal before. The performance is acceptable, your camera will keep level too. But your video will be shake when your multi-rotor change position or tying to hold position in a windy area.
I found some manufacturer released a controller and brushless motor for gimbal. So, I try to get some. And it not make me disappoint. The performance is more than I expected.
Camera is really stable and a bit shaking when you fly! I think with in this year. You’ll see more on this brushless gimbal product.