Unverified85% confidenceFactTime unknown
棱镜类型看BAK4优于BK7：将望远镜对准亮处观察出瞳圆斑，BAK4呈完整圆形亮斑，BK7边缘有灰暗方形切角，影响边缘成像和亮度
1
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85%
Confidence
Long-term
Relevance
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First Seen
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