The rings do not have lenses, so there is no fear of deterioration of the optical quality of the set, even when using high-class lenses. They are mounted between the camera and the lens, and their action consists in changing the distance between the lens of the lens and the photographic film or matrix in the camera - which allows a larger scale of reproduction.

The principle of operation is practically identical to that of zoom lenses. By turning the ring we can increase or decrease the distance in which the lens will be located. Compared to traditional sets of intermediate rings, this gives us greater convenience of use and control over the frame. All automatic camera modes will work with them and there is no need to work in manual settings. The autofocus AF will also work.