An adaptor with two male filter threads which enables a short focal length lens to be reverse mounted onto a long telephoto lens.
These rings have the same thread fitting on each side. To use lenses with different filter threads, use in conjunction with an SRB~Griturn STEPPING RING.
E.G. To couple two lenses with a 49mm and a 72mm filter thread, use a 72/72 coupling ring and a 49/72 stepping ring. When combined, you will have an adaptor with 49mm and 77mm male threads.
ANY SIZE CAN BE MADE TO ORDER
