1. Model: 2.5x17.5mm. 2. Material: all metal frame, strong and durable, good hand feel. 3. Focusing method: rotate focusing. 4. Mirror information: high quality composite all-achromatic optical lenses. 5. Eyepiece diameter: about 8mm. 6. Objective lens diameter: about 17.5mm. 7. Magnification factor: 2.5x. 8. Field of view distance: 8m/600m. 9. Field of view Angle: 6.5 degrees. 10. Pupil diameter: 16mm. 11. Pupil distance: 13.5mm. 12. Coating: blue film. 13. Product size: only 35x22mm. 14. Net weight: 20g. 15. Form: 3 pieces of 2 sets of objective lens are adopted. 16. The imaging is clear and bright due to the use of 3 pieces of 2 sets of objective lenses. 17. Its so small that you can see distant objects by just putting it on your finger!Bigger than your thumb.Anytime anywhere easy dexterity!It could be a small telescope in the world.
