Central Axis Focusing: Solid Structure, Stable and , Comfortable Grip and Accurate Focusing. Outlet Diameter: 60Mm, Waterproof Type: Waterproof. Largecaliber Wideangle: Generally, the Larger the Diameter of the Telescope, the Larger the Field of View, the Larger the Light Is, and the Better the Imaging Brightness. Magnification: 30 Times.Dimensions: 205*75*235Mm 30 Times Gold Magnification: Optical Practice Confirms Gold Magnification and is Clearer.