1. Material: metal 2. Objective lens diameter: 21 mm (24 mm) 3. Eyepiece diameter: 12 mm (19 mm) 4. Coating: Multi-layer broadband blue film red film coating 5. Prism: BAK9 optical prism eyepiece objective lens 6. Lightweight and strong, smooth rotation 7. All metal shell, good hand feeling 8. Dimensions: 73x48x35 mm 9. Weight: about 35 grams
