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  • General

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  • 光质量

     

    This lesson will help you learn and practice  QUALITY OF LIGHT.  In GET THE BASICS, you'll get explanations and photos to build understanding. In EXPLORE, you'll find additional online resources to learn more. It's important to review and learn from these resources also! You'll have opportunities to practice in BUILD YOUR SKILLS. Finally, answer the questions in RECORD YOUR FINDINGS at the end of this topic, be sure to include information you learned from the Explore resources.
    ::这将帮助您学习和练习光的品质。 在获取 BASICS 中, 您将得到解释和照片来建立理解。 在 Explore 中, 您会找到更多的在线资源来学习更多。 审查和学习这些资源也很重要 。 您将有机会在 BUILD 你的 SKILLS 中练习 。 最后, 请回答您在此专题结尾处记录的问题, 请务必包含您从探索资源中学到的信息 。


    GET THE BASICS 
    Light is essential to photos. In fact, photography is the process of capturing light. So, what can happen if there's too little or too much light?
    ::摄影是捕捉光的过程。所以,如果光太少或太少,会发生什么呢?

    If too little light reaches your digital camera's sensor, the results will produce photos that are too dark or even black. Three things affect exposure: shutter speed, aperture, and ISO (a rating for sensitivity to light). Your digital camera may not have ISO settings, or you may be using a smart phone with only scene modes. remember scene modes? They are auto settings that preset one or more of the exposure variables.  This lesson addresses two of the exposure variables: shutter speed and aperture. If your shutter speed is fast and the aperture is small, too little light may reach the camera's sensor. This can also happen in auto mode if there's just not enough light.
    ::如果太小的光线到达您的数字相机的传感器, 其结果将产生太暗甚至黑的照片。 有三件事会影响曝光: 百叶窗速度、 孔径和 ISO (对光的感知等级) 。 您的数字相机可能没有 ISO 设置, 或者您可能使用智能手机, 只有现场模式 。 还记得场景模式吗 ? 这些是预设一个或多个暴露变量的自动设置 。 此课涉及两种暴露变量: 百叶窗速度和孔径。 如果您的百叶窗速度快, 孔径小, 光线太小, 可能到达相机的传感器 。 如果光线不够的话, 这也可以在自动模式中发生 。

    In this photo, the sky is overcast, and there is too little light. The photo looks dark, flat, and dull. The term for this is underexposed .
    ::在这张照片中,天空被遮盖,光线太小。照片看起来黑暗、平坦和枯燥。这个术语被低估了。

    overcast and dark day in the city


    Here's an example of a very underexposed photo. The photo is so dark that it's hard to see the person.
    ::照片太暗了,很难见到他

    dark underexposed photo of a person


    You see what can happen if there's too little light. What about too much light? Too much light can produce a photo that's way to bright. The term for this is overexposed . If a photo is way overexposed, the bright parts of the photo can appear all white with no details. This is called blown out . Overexposure can occur if the shutter speed is too slow and/or the aperture is too large. It can also happen in auto mode if there's just too much light.
    ::如果光太小, 灯光太小, 灯光太小, 灯光太大, 光能产生光亮的照片。 光线太大, 光线太亮。 光线太广, 光线太广。 如果照片太广, 光线的亮点会显示白色, 没有细节。 这被称为吹灭。 如果透光速度太慢, 光线太高, 光线也太大, 光线就会过度暴露。 如果光线太高, 光线也会发生。

    In this example, n otice how the dogs and the background are so light that they lose all detail and run together (pun intended). Note: this photo has been edited to appear overexposed and blown out.
    ::在此示例中, 请注意狗和背景如何如此明亮以致失去所有细节并一起运行( pun 想要) 。 注意: 这张照片经过编辑, 显示过度曝光并爆炸 。

    sled dogs in action


    Here's another example of an overexposed, blown out photo. The background is totally white, and the bright areas of the blossoms blend with the background.
    ::这是另一例过度曝光, 照片被吹散。背景是完全白的, 鲜花的亮点与背景混杂在一起。

    overexposed, blown out photo of blossoms


    EXPLORE
    Take a quick look at the same subject photographed three ways - underexposed, correctly exposed, and overexposed - at Photographic Examples of Exposure from DigicamGuides:

    ::照片来自DigicamGuides的摄影照片实例:

    Now, learn more about how shutter speed, aperture, (and ISO) work together at The Ultimate Beginner's Introduction to Exposure from tuts+ Photography. Focus on shutter speed and aperture, and check out the examples in the "Putting It All Together for the Perfection Exposure" section:

    ::现在,更多了解百叶窗速度、孔径、(和ISO)如何在《终极初学者关于Tuts+摄影照射的介绍》中共同工作。关注百叶窗速度和孔径,并查看“将它一起投放到完美曝光”一节中的例子:


    BUILD YOUR SKILLS  
    To build your quality of light skills, you're going to shoot photos that have too little or too much light - two photos of each.
    ::为了建立你的光技能质量, 你将拍摄那些光太少或太少的照片—— 每人两张照片。

    Review your quality of light photos. Select ONE photo for EACH for too little and too much light .  Share your photos with your teacher, and be prepared to discuss how they show what you’ve learned.  Download your photos to a computer to keep them for the portfolio you’ll create in the end-of-course final project.
    ::检视光照的质量。 选择一张照片, 供AEA少之又少。 与老师分享您的照片, 并准备讨论他们如何展示您学到的东西。 将您的照片下载到电脑上, 以保存您在期末项目中将制作的投资组合 。


    RECORD YOUR FINDINGS
    ::记录你的调查结果

    • What can happen to a photo when there is too little light?
      ::光线太小,照片会怎样?
    • What can happen to a photo when there is too much light?
      ::如果光线太亮,照片会怎样?
    • What does is mean to be underexposed? Overexposed?
      ::暴露不足意味着什么?
    • What does it mean for a photo to have an area that's blown out?
      ::照片的面积被炸掉意味着什么?
    • Describe how the quality of light in each of your selected photos affects the appearance of the photo.
      ::描述您所选照片的光质量如何影响照片的外观 。