Does this porro prism design have external focusing, and does it acheive water proofing with an o-ring?
Hello Juris, Thank you for your email. Yes, this is a center focus porro prism so it has a center focus wheel in the center of the binocular chassis. I apologize but I’m not certain if it uses an O-ring to seal that chassis – but I have attached the direct link to the Audobon Raptor on Vortex’s website for you to view. Usually if a binocular uses an O-Ring. . they mention it in it’s specs. Hope this helps: http://www.vortexoptics.
