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Message: <blockquote data-quote="ronh" data-source="post: 1280553" data-attributes="member: 55514">Elkcub,If you are a psychologist, great, we need help bad. And, you talk very like an optician, if that's a compliment. But, the factor of two quandry resulting from lines vs line pairs does not begin to absorb the magnitude of my misunderstanding, which is more like a factor of ten.Ron and Henry,40 lp/mm in the focal plane of the objective should indeed be a piece of cake for a good binocular. According to the plot, 40 lp/mm is certainly being "resolved"-- I guess resolution could occur down to much lower than 25% of object contrast, maybe less than 5% in an almost-greyed out view. But the plotted bino seems to be running out of contrast gas mighty fast with increasing image frequency. If the plot were extrapolated, 5% contrast would fall somewhere around 60 lp/mm. So, thank you for your work, and maybe you see my problem. Binoculars are better than that! I am confident that I am simply misunderstanding something, but can't figure out what it is.Ron</blockquote>