Leica mini-prism mode, total station mini-prism, constant error of prism is about 0.5 mm, and a metal base is added to the conventional Leica prism to assemble a prism group, which is applied to CP ⅲ measurement.

JpMini prism adopts prism fast ranging mode, which improves the measuring speed by 360, but reduces the accuracy. The prism continuous ranging mode is adopted.