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Message: <blockquote data-quote="Kevin Purcell" data-source="post: 1666567" data-attributes="member: 68323">For all those invoking other bins diopter issues -- this just a non-zeroed diopter setting. Annoying but not fatal. The one I have has a small but non-zero offset too for my corrected vision.Not a drifting or loose setting (it locks on the 7x36) like Tero's Bushnell or a complex diopter setting mechanism like the first version of the Vortex 6x32. The diopter on the ZR (like the other Chinese EDs) just moves the right hand eyepiece in an out and is not coupled to the rest of the focusing mechanism (that was the issue with the Vortex 6x32).It's actually settable by the user in dire circumstances (like being in Sweden and not wanting to ship the bins back to the USA <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" /> ). Of course I'd talk to ZR first as this would void your warranty, I presume. But there is an option if you don't want to send it back.If you lift the glued on branding badge in the center of the focuser there is a aluminum plate inside the cage-like knob on a brass bushing that moves on a screw thread (turned by the focuser knob) that is attached to two brass rods (one for each focusing element in the bin). One is rigidly screwed in place on the plate and the other has a spring loaded offsetting mechanism that connects it to the plate. So as you turn the small screw on that one with the offset the physical focusing offset (i.e. the diopter) between the tubes changes. Zero the external diopter setting (on the mark by the right eyepeice) then turn that screw (a small amount each time) until you have good focus in both eyes at the same time. Then add a dab of Locktite (blue? the non-permanent one) to hold the screw in place. Finally stick the branding label back in place (if you lifted it carefully enough ... or ask ZR for a new one!).How do I know? I had a small issue with a Promaster ED focusing that I own that wasn't warranted for me so I fixed it. No issues since <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" /></blockquote>

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