The aiming line is helpful for quick sighting. The focusing knob allows a smooth and accurate focusing with one-finger. The Dust Protection Glass protects the scope body from dust and moisture. The sliding sunshade prevents unnecessary light and raindrops. The bayonet mount assures easy and quick interchanging of eyepieces. Ultra Lightweight Body These scopes weigh less than 745g (25-26 oz) but are tough enough to withstand the most adverse conditions. Fully Multicoated All Lens All lenses, prisms, and dustproof glass are fully multicoated, ensuring sharp images and a clear visual range. Waterproof and Filled with Dry Nitrogen The housing is waterproof to JIS* Protection Class 7** and filled with dry nitrogen gas to prevent the lens from fogging. * JIS=Japanese Industrial Standard. ** The scope is not intended for use underwater. Specs: TSN-601 (Angled Type) Objective Lens Effective Diameter: 60mm Objective Lens: Normal Lens Minimum Focusing Distance: 6m Length: 299mm Weight: 735g Filter Thread: 67mm TSN-602 (Straight Type) Objective Lens Effective Diameter: 60mm Objective Lens: Normal Lens Minimum Focusing Distance: 6m Length: 299mm Weight: 720g Filter Thread: 67mm In the Box: 1x Kowa TSN-600 Series 60mm Spotting Scope (Requires Eyepiece)