| 摘要 |
A retrofocus-type objective for an endoscope which comprises a first lens component comprising a negative lens, a stop, a second lens component comprising a positive meniscus lens, a third lens component comprising a positive lens, a fourth lens component comprising a cemented doublet which consists of a positive lens and a negative lens, and a fifth lens component comprising positive lens, the retrofocus-type objective for an endoscope being arranged to be focused by advancing the third and fourth lens components.
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