The optical quality of a binocular or spotting scope can be divided into several categories. Understanding the categories can help you differentiate between different optics, and find the right fit for you.
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Yellow Warbler audio recorded by Matthew D. Medler. Courtesy of The Macaulay Library at the Cornell Lab of Ornithology.
Yellow Warbler and Yellow Throated Warbler illustrations by Jen Brumfield.
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Негізгі бет Optical Quality 101
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