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Message: <blockquote data-quote="LanceSaintPaul" data-source="post: 3280207" data-attributes="member: 121582">"But I'm not fine with not using the same set of reference eyes when comparing two binoculars. The correct way to perform that test would be to swap binoculars with her and compare the hit rates."Agreed! That fine point occurred to me only after I went out to the back yard to do some observing myself. So Lee, do you ever mix it up that way? OR are you & your wife so familiar with each other's perceptions that you can make a reasonable guess based on what you know of the way she finds things? That could be enough for you to feel confident in making a conclusion for yourself about this.</blockquote>