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Enlarging lens system

Image Number 5 for United States Patent #4057328.

An enlarging lens system comprising a first lens component which is a positive meniscus lens, a second lens component which comprises a positive meniscus lens and negative meniscus lens, a third and fourth lens components which are respectively positive meniscus lenses, a fifth lens component which comprises a negative meniscus lens and positive meniscus lens, and a sixth lens component which is a positive meniscus lens. Said enlarging lens system is characterized in that thin lenses having weak refractive powers are used as the third and fourth lens components, the aperture ratio is large and aberrations are favorably corrected.

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