APEXEL APL-JS28X 28X HD External Dual-adjustment Zoom Telescope Universal Telephoto Phone Lens

1. Optical magnification: 28X 2. FOV: 6.8 degrees 3. Prism material: K9 4. Number of lenses: 6 elements in 4 groups 5. Coating: Multilayer 6. Focusing range: 5 meters and above 7. Lens interface: M17xP0.75 8. Lens material: aluminum + plastic 9. Lens length: 159mm