There are several optical designs used for telescopes. No optical system is absolutely perfect.

在望远镜设计中都存在着几种像差，没有所谓的完美的光学系统。

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Prevalent programs for the automatic correction in optical designs adopt either the adaptive method or follow the damped least square approach.

目前国内外的光学自动设计程序都采用单一的适应法或阻尼最小二乘法。

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Each USES new manufacturing processes and body designs, including OLED touch screens and optical sensors.

每一款都采用了新的制造工艺和外观设计，包括OLED触摸屏以及光传感器。

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Advanced optical and mechanical designs are optimized to keep the lens compact, while maintaining a physical aperture ring so that users can make fluid adjustments.

ENGADGET: Fujifilm grows X-series mirrorless lineup with 16.3-megapixel X-E1