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。
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。
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。
The annular aperture of typical mirror lenses results in out-of-focus images with a pronounced 'bright ring' effect.
典型反射镜头的环状光圈导致失焦影像呈现明显的“亮环”效应。
Considering diffraction effect based on scalar theory, we deduced a formula for point spread function of the coded aperture and discussed the ring coded aperture in detail.
基于标量衍射理论，考虑衍射效应的条件下，从理论上推导了编码孔径点扩散函数的公式，并对环形编码孔径进行了详细的讨论。
In this paper, diffraction integral equations and Bessel Functions are used to getting perfect solution of Fraunhofer ring aperture diffraction, and the diffraction pattern is analysed.
本文从衍射积分公式出发，利用贝塞尔函数，求得夫琅禾费环孔衍射积分的精确解，并对衍射图样进行分析讨论。
Diffracton integral equations and Bessel Functions are used to get perfect solution of Fraunhofer ring aperture diffraction, and the diffraction pattern is analysed.
从衍射积分公式出发，利用贝塞尔函数，求得夫琅禾费环孔衍射积分的精确解，并对衍射图样进行了分析。
Both lens variants have a focus-ring made of grained black leather which is edged into two chrome rings seeming noble and a aperture-ring into black paintwork.
这两个镜头的变种有重点环制成颗粒黑色皮衣是微升分为两个似乎崇高铬环和光圈环成黑色油漆。
Both lens variants have a focus-ring made of grained black leather which is edged into two chrome rings seeming noble and a aperture-ring into black paintwork.
这两个镜头的变种有重点环制成颗粒黑色皮衣是微升分为两个似乎崇高铬环和光圈环成黑色油漆。
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