Description
Lens extension tube, no sliding-, no paint-fading..Suitable for video surveillance- and industrial.High-grade aluminum material, fine workmanship-, good quality.When the lens focus- is not clear and need to find the rear focus-, the adapter is used to realize the conversion between interfaces, so as to present the best image-..When it is used: 1. The camera is CS-port, the lens is C-ports, which makes the interfaces into a consistent, but also increases the focal- length. 2. The camera and lens are both C-ports, thus increasing the focal- length.