Check the shutter dial and aperture ring to make sure you have the correct exposure.

检查快门速度光圈以确保正确的曝光量。

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The aperture ring is just taut enough and incredibly smooth, and obviously because they are designed for motion film and video, it is click-stop free.

光圈环结合紧密却又难以置信的顺滑，显然是专为电影拍摄设计的。

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The aperture field distribution of the ring focus antenna is reviewed in view of the energy conservation law, and the simple formula for calculating its radiation pattern is deduced.

该文从能量守恒观点出发，讨论了副面为椭圆的环焦天线的口径场分布，并导出了计算其方向图的简单表达式。

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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.

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On the other hand, the dedicated aperture ring and exposure compensation dial were incredibly useful, and, with the proper accessories, I could make very good use of the full-size hot shoe on top.

ENGADGET: IRL: Sony's Cyber-shot DSC-RX100 and the full-frame RX1

We really appreciated all the manual controls on the RX1 -- from the aperture ring to the exposure compensation and shutter adjustment dials -- as they allowed for speedy adjustments on the fly and kept menu fatigue to a minimum.

ENGADGET: Sony Cyber-shot RX1 sample images and video Hands-on