- This macro extension tube is suitable for all M68 x 1mm Screw Mount Cameras and Lens. - This extension tube also be used as a Lens Hood. - 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 tube does not affect image quality asthere is no optics inside. - Auto-focus function cannotoperate. Specification: - Rear thread: 68mm x 1mm - External dimension: 72mm - Internal dimension: 65mm; - Color: Black - Material: Aluminium. Package - 1 x Lens Tube.