The appearance of high -intensity alloy fuselage is small, portable, expansion and zoom, and high cost performance. Manual adjustment, all metal structure optical glass multi -layer coating. With 420-800mm ultra-long focus zoom, it is a super cost-effective choice for bird watching and wildlife photography. The lens structure is 4 groups and two groups, with good workmanship and imaging. Exquisite workmanship, high accuracy, good optical quality. It is worth having and enjoyable. length: 420-800mm Aperture: f8.3-16 Structure: 4 pieces in 2 groups Closest focus: 1.5m Filter diameter: 67mm Lens anti-shake type': without anti-shake Appearance size: 75x228mm Colour:White Material:metal+optical glass Package Contents: 1 x Lens 1 x Adaper Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.