- This macro extension tube set is suitable for all M52 x 1mm Screw Mount Cameras. - Transform your Lens into a Macro Lens. It moves the lens from the filmor digital sensor. The closer the focus is, the greater themagnification. - The extension tube does not affect image quality asthere is no optics inside. In comparison, a close up filter is often blamed for degrading the quality of image. Auto-focus function cannotoperate. - This tube set consists of 3 individual tubes, camera body mount and a lens adapter. - The 3 individual rings can be used separately with thec amera body mount and a lens adapter, and of course the magnificationratio will be different. Specification: - Female side: M52x1 screw thread. - Male side: M52x1 screw thread. - includes 3 extension tubes: 7mm, 14mm, 28mm.