Shutter speed is usually set in fractions of a second 1/200, 1/100, 1/30, etc. (in Vray Physical Camera the “1/” part is set by default so if you set the shutter speed to 50 it’s actually set to 1/50th of a second).
快门速度通常设置在几分之一秒内1/200、1/100、1/30,等等。(在Vray物理相机“1 /”部分是缺省设置的,所以如果你设定快门速度为50实际上设置为1/50秒)。
F/Number (Aperture) sets the diameter of the hole in the lens that let’s the light in. F /号码(孔径)设置镜头孔的直径,光线的入口。
Larger opening let’s in more light and makes the image brighter, as well as increasing the DOF effect.
更大的开口让我们放进更多的光,使图像更亮,以及增加景深效果。
These numbers work in reverse so increasing the aperture value actually decreases the size of the hole!
这些数字反向工作的因此增加孔径值实际上降低了孔径的大小！
This means that f2 is brighter than f8 and f8 is brighter than f16 (you get the point!). 这意味着f2比f8更亮，f8比f16更亮(你懂的~ !)。
ISO just controls the sensitivity of the film/sensor. Higher sensitivity means brighter image, lower means darker image.
ISO仅仅控制传感器的灵敏度。高敏感性意味着图像更亮,降低则反之。
VRay artists are actually very lucky compared to real photographers – in real world increasing the ISO means increasing the image noise, so it’s limited in it’s use.
VRay艺术家实际上是非常幸运的相对真正的摄影师——在现实世界增加ISO意味着增加图像噪点,所以它的作用有限。
For us however it doesn’t have this drawback! 然而我们没有这个缺点!
You can increase (or decrase) this value as much as you want without any negative effects! 你可以增加(或减小)这个值就但是没有任何负面影响!
ISO is the most flexible way to adjust the exposure – it doesn’t affect anything else except the brightness of your render!
ISO是最灵活的方式来调整曝光——它不会影响任何其它东西除了亮度的渲染!
“Ok, but how do I set the exposure for my render?!” “好吧,但我如何给我的渲染设置曝光呢? !”
Here’s a how you should do it – First decide if you will use camera DOF and Motion Blur (many people choose to add them only in post-production).
以下是你应该如何做,首先决定你将是否使用相机景深和运动模糊(许多人选择在后期制作添加)。
Adjust the F/Number to get the desired amount of DOF, adjust the Shutter Speed to get the desired amount of Motion Blur and finally use the ISO to get the desired Exposure of the image. 调整F /x获得所需的DOF,调整快门速度获得所需的动态模糊,最后使用ISO获得所需的曝光值。