相机的测光方式要设置在局部测光或点测光方式，测光点对着你想要锁定曝光值的目标，按下锁定钮。
To make this work, use the partial metering mode (or spot metering mode) over the subject where you want to lock the flash output then press the asterisk (*) button.
拍摄时，使用点测光，测量天空与海面的部位。
When shooting, use spot metering to measure the sky and the sea level.
数码ESP矩阵和点测光选项。
具有共轭点的类光测地线的固有加速度趋于无穷大。
It is shown that the proper acceleration of null geodesic with conjugate points approaches infinity.
系统采用拉曼光时域反射技术，对所测点进行定位。
The position of measurement point was determined by Raman scattering optical time domain reflection (OTDR) technique.
用自动测光还有一点不好，特别是对于一些新手，他们经常的倾向于埋怨相机有问题。
There's a side-effect to using automatic metering that I've noticed among newcomers to photography - there is a tendency to blame the camera.
该系统中引入了一个转动平台带动相机运动，使相机光轴始终对准运动的光学测头中某一个光点，保证光学测头成像在畸变比较小的像面中心附近。
In this system the axis of the camera always aims at the moving optical probe to ensure the probe imaging in the center of the image plane.
该系统中引入了一个转动平台带动相机运动，使相机光轴始终对准运动的光学测头中某一个光点，保证光学测头成像在畸变比较小的像面中心附近。
In this system the axis of the camera always aims at the moving optical probe to ensure the probe imaging in the center of the image plane.
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