M42 Extension Tubes, Macro Tube Ring 3 Tubes for 42mm Screw Mount Set Film/Digital SLR

【Wide Scope of Application】This brand new Macro Extension Tube Set for your film & Digital SLR includes 3 extension tubes - 9mm, 16mm, 30mm adapters. 【Wide Scope of Application】This brand new Macro Extension Tube Set for your film & Digital SLR includes 3 extension tubes - 9mm, 16mm, 30mm adapters. 【Wide Scope of Application】This brand new Macro Extension Tube Set for your film & Digital SLR includes 3 extension tubes - 9mm, 16mm, 30mm adapters. 【Guarantee optical quality】Use this set will not downgrade the optical quality of your lens. Sharpness and Saturation can be still maintained. But they are not meter-coupled. They do not preserve the automatic diaphragm. 【Used with manual lenses 】It should be used with manual lenses with their own aperture dial. 【Be used with their widest open aperture 】There is no electronic connection between the body and the lens. Automatic lenses can be used with their widest open aperture only. 【'M' mode】When using the extension ring with a DSLR / SLR, the camera should be set in the 'M' mode.