52MM 52MM CLOSE UP MACRO COUPLER LENS REVERSAL RING D IN INDIA

Title SUPER BRAND MACRO COUPLER  52MM 52MM BOTH SIDE MALE THREAD These rings are frequently used to connect two lenses. More precisely, each male thread is mounted on the filter thread of a lens, and, consequently, these lenses are reversely mounted. Why are macro coupler needed? In general, when a lens is reversely mounted, magnification is increased. For example, if the prime lens has a focal length of xmm and the reversely mounted lens has a focal length of ymm, then the combined lens will have a magnification of x/y. Made of Metal.  IF YOU HAVE ANY PROBLEM KINDLEY PLEASE 1ST YOU INFORM ME AND PLEASE GIVE ME POSITIVE FEEDBACK   Octroi if applicable