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Fantao网站上关于全七目镜有相对详细的分析,原链接为:http://binofan.home.att.net/komz.htm
转载如下:
The large eyepieces are individually focused, with a reticle on the right side. The eyepiece design is the most sophisticated I have seen in a handheld binocular, with 7 elements in a 2-1-3-1 configuration (see the picture below). This is very similar to the eyepiece design used in the Russian 30x180 binocular*. A negative field lens is employed to help reduce field curvature and other aberrations, as in the Nagler eyepiece design. The eyepiece in the KOMZ is not exactly like a Nagler but looks more derived from the Abbe Orthoscopic design with its triplet. The triplet has a yellow element, resulting in noticeably yellow images. I am not sure if this was deliberate for military requirements or if a special glass type was selected to improve optical performance. It is also possible that there is an aspheric surface employed, as the rectilinear distortion is practically zero. Note that the view through these binoculars has a "rolling ball" effect (as the image rolls off the edge) also seen in other low distortion designs. At any rate, the image is very sharp with pinpoint star images nearly to the edge. |
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