Frequently Asked Questions about binoculars, a technical note prepared by NIPON SCOPE & OPTICS Index 1. How to adjust binoculars? 2. What do the numbers mean in the binoculars title? 3. What is Porro Prism or Roof Prism system? 4. What is field of view? 5. What are lens coatings for? 6. What is eye … Continue reading FAQ about Binoculars