Porro Prism - Porro prisms only reflects light 4 moments and it will come out on a special line than it went in on, causing the need for a bigger overall body and consequently Porro prism binoculars are heavier than roof prism binoculars. Section corrected dielectric coated prisms for max https://wise-social.com/story3498235/5-simple-techniques-for-hunting-binoculars