In tripods with this function, the head has a special plate (platform) with a mounting screw for the camera, installed in the mounts, which ensure its quick removal and re-installation on a tripod. This design increases the efficiency of work: it is enough to screw the platform to the camera once, and installing / removing the camera (together with the platform) will be much faster and easier than if you had to screw it back to the tripod itself every time.
Removable platform is considered mandatory for professional tripods.
The presence of a
built-in tripod level — a device that allows you to control the horizontal position of the camera.
Spirit levels are most often used — in the form of a sealed flask with liquid and an air spirit: if the spirit is between the marks on the flask, then the camera is on the horizon. The simplest option provides one flask to control the tilt to the right and left in order to avoid a “littered horizon”; however, the design may provide another level that monitors the tilt back and forth, or one common two-axis bulb. And in the model with a horizontal rotation of the rod (see above), an additional level is often set — for the horizontal mode. Anyway, this function greatly facilitates the exposure of the camera "on the horizon".
