Leica Ultravid 10x25 binoculars.
These have an eye relief capability, which allows spectacle wearers to adjust for a single person, then simply hand to another spectacle wearer with no further adjustment required to maintain perfect focus.
Other than pupillary distance adjustment, once one of us has adjusted the focusing, they are an adjustment free pair of binoculars as we hand them back and forth between us; something we wish we'd known about once we purchased these binoculars about 12 years ago.
Do you have an exact model for that? THe Ultravid I find does not mention anything about the dual focus.
I see what you mean. I read through a few reviews of this binocular, not one mentioned this spectacle eyepoint adjuster.
In this Australian link, you can see the first image, which shows the front element pulled out on each lens. On one lens it has Leica Camera, the other side has 8x20. This is how the binoculars are used by someone without spectacles.
Leica Store | LEICA ULTRAVID 8x20 BR black w. AquaDura
Leica stands for visual enjoyment and lasting value. Our approach and Leica's unique technical expertise make our optical instruments ideal companions offering the highest possible reliability and durability.leica-store.com.au
This second link shows the binoculars in their compressed state, which is how the binoculars are used by spectacle users. Essentially we have an infinity section on our spectacles and we view the binoculars using the infinity part of our spectacles. Once infinity is correct for one persons eyes through their spectacles, the focusing is correct for anyone using their spectacles through the infinity section of their spectacles.
This review also shows the little focusing adjustment button in the centre on the underside of the binoculars. Once you have set this, and if you are using spectacles all of the time, then I don't think you will need to adjust initial focus. We haven't needed to adjust ours since our initial adjustment when we were shown by the Camera Shop proprietor in Germany.
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Leica Ultravid BR 10x25 Review
It is incredibly difficult to make binoculars compact without sacrificing optical quality, but Leica largely succeeds at that task with the Ultravid BR...www.outdoorgearlab.com
I hope this answers your questions.
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