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асфералық линза
A lens with a curved, non-spherical surface. Used to reduce aberrations and achieve a more compact lens size. With a spherical lens, rays travelling from the lens periphery create the image before the ideal focal point and give a blurred image centre. With an aspherical lens, even the rays travelling from the lens periphery converge at the ideal focal point, thus producing a sharp image.
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- 词汇： A Glossary of Photographic Terms
- 行业/领域： 摄影
- 类别 镜头; 摄影技术
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