preset aperature ring是什么意思

用法例句

In making a video recording, the control of diaphragm is actually the control of the picture exposure and its shadow adjusting.

在摄像艺术创作中,对光圈的控制实际上是对画面曝光和产生不同影调的控制。

In the television teaching material photography,the adjustment and the control of camera aperture is actually that of the picture exposure,and is also closely connected with the program art effect and the picture technology quality.

在电视教材拍摄中,对摄像机光圈的调节和控制实际是对画面曝光的调节和控制,无论与节目艺术效果还是与画面技术质量都紧密相关。

This paper is the discussing about the aperture-coefficients of the Zoom Lens, the formula for the calculating is: F=f/d (where.

该论文是探讨变焦镜头的光圈系数 ,镜头的光圈系数的计算公式 :F=f/D(其中 :F为光圈系数 ,f 为镜头焦距 ,D为光圈开口直径 ) 。

The functions, the hardware structure and the software structure of the test system for aperture performance are presented in this paper, and the designs of electric controller and optics coupling system are discussed in detail.

介绍了光圈性能测试控制系统的硬件组成和功能及软件的结构,对电气控制部分和光学耦合系统的设计进行了详细的讨论。

Based on some relevant calculating formulas,this paper deduces the calculating formula of aperture value while usin g off -camera direct flash in close photograph.

在近距摄影中,用闪光灯作为光源,难以控制的是曝光量,本文根据有关计算方法,从理论上推导出侧位直接闪光法在近距摄影中的光圈系数计算公式,对影响曝光结果的因素进行定性分析,同时通过试验加以证实并说明应用方法。