This brand new Macro Extension Tube Set for M42 (42mm x 1.0) screw mount includes 3 extension tubes – 7mm, 14mm, 28mm adapters. You may mount the tubes between lens and camera body to get your choice of macro ranges. There are totally 7 combinations. Using 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. It should be used with manual lenses with their own aperture dial. When using the extension ring with a M42 body, the camera should be set in the ‘M’ mode. Wemacro M42 extension tubes have a 1.0mm pitch thread.
