发明授权
US5139342A Photographic lens system 失效
摄影镜头系统

Photographic lens system
摘要:
A photographic lens system comprising, in the order from the object side, a first lens component which is designed as a cemented doublet consisting of a positive lens element and a negative lens element in this order, a second lens component which is designed as a cemented doublet consisting of a negative lens element and a positive lens element in this order, and an aperture stop arranged between said first lens component and said second lens component, and using at least the aspherical surface therein. This photographic lens system comprises a small number of lens elements, and has a high aperture ratio and favorably corrected aberrations.
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