48 期待价格 美国本土1200米刀。http://www.vortexoptics.com/prod ... -hd-10x42-binocular ...
Then we tested the scope at night in order to show how the optics of the Viper deals with astigmatism, coma, and brightness loss on the edge of the field. We admit we set the standards very high - after all an eyepiece with a narrow field of view has to be corrected perfectly well,...
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Abstract: From an accretion disk to quantum spin, a vortex gravitational field occurs everywhere. What gives the vortex the power of infinite rotation? This paper reviews the study of vortices in terms of topology and mathematics. It was found that cosmic vortices originate from the topological ph...