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我国照相机行业的排头兵、开发能力较强的上海海鸥照相机厂（原上海照相机总厂）新品迭出，最近又向市场推出了两款新镜头，为我国照材行业填补了空白。现介绍如下：镜头之一：FI．4／SOmm大口径标准镜头，其主要技术指标如下：焦距：f＝50mm最大相对孔径：l。1．4视场角：ZW一
China’s vanguard of the camera industry, the development of a strong Shanghai Seagull camera factory (formerly Shanghai Camera Factory) new products and more recently introduced to the market two new lenses for the Chinese material industry to fill a gap. Now introduced as follows: one of the lens: FI. 4 / SOmm large diameter standard lens, the main technical indicators are as follows: Focal length: f = 50mm Maximum relative aperture: l. 1.4 angle of view: ZW one