A lens system has a plurality of lenses, a stop, and a diffractive surface, the entire lens system moves during focusing, and the lens system satisfies the condition of 0.5, where is a maximum photographic magnification.

 
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< Hybrid lens and projection optical system including the same

< Objective lens with the diffractive surface for DVD/CD compatible optical pickup

> Advanced compact head up display

> Photographing lens
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