| 摘要 |
A large-aperture enlarging lens system which comprises a first positive meniscus lens component, a second positive meniscus lens component, a third lens component consisting of two lens elements, a fourth lens component consisting of two lens elements and a fifth positive lens component, either one of said third and fourth lens components arranged on both sides of a stop having a convex lens on the side of said stop, and wherein aberrations are favorably corrected.
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