Madezz Extension Tube Ring,Macro Extension Tube Ring for M42 42mm Screw Mount Set for Film/Digital SLR music_update_2021 Color:black and red FarBoat knows

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Madezz Extension Tube Ring,Macro Extension Tube Ring for M42 42mm Screw Mount Set for Film/Digital SLR music_update_2021 Color:black and red FarBoat knowsMadezz Extension Tube Ring,Macro Extension Tube Ring for M42 42mm Screw Mount Set for Film Digital SLR Description: On most lenses, the manufacturers provide a focusing mechanism that extends only a few millimetres, partly to keep down costs and partly to restrict the lens to extensions for which its optics are optimised. To provide additional extension, one or more extension tubes can be added between the camera and the lens, to make the lens focus