characteristic: 1. BKA4 Prism: The spot light transmittance is high, the picture is transparent, clear and bright. 2. The large eyepiece is coated with a blue film, which has a large field of view and comfortable viewing; 3. The large objective lens increases the amount of light entering, and the image is clearer and brighter; 4. All-optical glass lens, full-surface multi-layer broadband coating, the image is not distorted and not distorted, and the viewing is pleasing to the eye. The super light transmittance and concentrating function of the lens make it visible to the low light. Specifications: Outlet pupil diameter: 12.7mm Multiplication: 10 times Prism material: Bak4 Field of view: 168 Dimensions: 20.2X19.2X7.3cm/7.95 * 7.5 * 2.87 inch Item NO.72349665