focal length

简明释义

焦距

英英释义

例句

1.When shooting wildlife, a lens with a long focal length helps to get closer to the subject without disturbing it.

在拍摄野生动物时，使用长焦距的镜头可以在不打扰被拍摄对象的情况下更近距离地拍摄。

2.For portraits, a longer focal length is often preferred to create a pleasing compression effect.

在拍摄肖像时，通常会偏好使用较长的焦距以产生令人愉悦的压缩效果。

3.A shorter focal length allows for a wider field of view, making it ideal for group photos.

较短的焦距可以提供更广的视野，非常适合拍摄团体照。

4.The photographer chose a lens with a focal length to capture the stunning landscape.

摄影师选择了一款具有焦距的镜头来拍摄美丽的风景。

5.Understanding focal length is crucial for adjusting your camera settings correctly.

理解焦距对于正确调整相机设置至关重要。

作文

Focal length is a fundamental concept in photography and optics that defines the distance between the lens and the image sensor when the subject is in focus. It is measured in millimeters (mm) and plays a crucial role in determining how much of a scene will be captured in the photograph. Understanding focal length (焦距) is essential for photographers to effectively compose their images and achieve the desired artistic effect.When we talk about focal length (焦距), we often categorize lenses into three main types: wide-angle, standard, and telephoto. Wide-angle lenses have a short focal length (焦距), typically ranging from 14mm to 35mm. These lenses allow photographers to capture a broader view of a scene, making them ideal for landscape photography or tight indoor spaces. The wider perspective can create a sense of depth and dimension, enhancing the overall composition.On the other hand, standard lenses usually have a focal length (焦距) between 35mm and 70mm, providing a field of view that closely resembles that of the human eye. This makes them versatile for various types of photography, including portraits and street photography. They offer a natural perspective without significant distortion, allowing subjects to appear more lifelike.Telephoto lenses, with a long focal length (焦距) of 70mm and above, are perfect for capturing distant subjects without having to physically move closer. Photographers often use these lenses for wildlife photography, sports events, or any scenario where they need to maintain a safe distance from their subjects. The compression effect produced by a longer focal length (焦距) can also create striking images, where the background appears closer to the subject, enhancing the visual impact.In addition to the type of lens, the focal length (焦距) also influences the depth of field in an image. A shorter focal length (焦距) generally results in a greater depth of field, meaning more of the image will be in focus. This characteristic is particularly useful in landscape photography, where capturing intricate details from foreground to background is essential. Conversely, a longer focal length (焦距) tends to produce a shallower depth of field, allowing photographers to isolate their subjects from the background. This technique is often employed in portrait photography to create a pleasing bokeh effect, where the background is softly blurred, drawing attention to the subject.Moreover, understanding focal length (焦距) is vital for achieving proper framing and composition. By adjusting the focal length (焦距), photographers can control how much of the scene is included in the frame. This ability to zoom in or out allows for creative storytelling through images. For instance, a photographer might choose a wide-angle lens to capture the vastness of a landscape but switch to a telephoto lens to focus on a specific element within that landscape, like a mountain peak or a tree.In conclusion, mastering the concept of focal length (焦距) is essential for any aspiring photographer. It not only affects the composition and perspective of an image but also influences the emotional impact it can convey. By experimenting with different focal lengths (焦距), photographers can develop their unique style and enhance their storytelling abilities through visual art. Whether capturing sweeping landscapes or intimate portraits, understanding focal length (焦距) will undoubtedly elevate one's photography skills to new heights.

焦距是摄影和光学中的一个基本概念，定义了镜头与图像传感器之间的距离，当主题处于对焦状态时。这是以毫米（mm）为单位测量的，并在确定拍摄的场景有多少会被捕捉到的照片中起着至关重要的作用。理解焦距（focal length）对于摄影师有效地构图他们的图像并实现所需的艺术效果是必不可少的。当我们谈论焦距（focal length）时，我们通常将镜头分为三种主要类型：广角镜头、标准镜头和长焦镜头。广角镜头的焦距（focal length）较短，通常在14mm到35mm之间。这些镜头允许摄影师捕捉更广阔的场景，使其成为风景摄影或狭小室内空间的理想选择。更宽的视角可以创造出深度和维度感，增强整体构图。另一方面，标准镜头的焦距（focal length）通常在35mm到70mm之间，提供的视野与人眼的视野相似。这使得它们在各种类型的摄影中都很通用，包括肖像和街头摄影。它们提供了自然的透视，没有显著的失真，使主题看起来更加生动。长焦镜头的焦距（focal length）为70mm及以上，非常适合在不需要靠近的情况下捕捉远处的主题。摄影师通常使用这些镜头进行野生动物摄影、体育赛事或任何需要与主题保持安全距离的场景。长焦距（focal length）产生的压缩效果也可以创造出引人注目的图像，使背景看起来更接近主题，增强视觉冲击力。除了镜头类型外，焦距（focal length）还影响图像的景深。较短的焦距（focal length）通常会导致更大的景深，这意味着图像的更多部分会处于焦点。这一特性在风景摄影中尤其有用，因为捕捉从前景到背景的复杂细节至关重要。相反，较长的焦距（focal length）往往会产生较浅的景深，允许摄影师将主题与背景隔离开来。这种技术通常用于肖像摄影，以创造令人愉悦的散景效果，其中背景柔和模糊，吸引注意力集中在主题上。此外，理解焦距（focal length）对于实现适当的构图和框架至关重要。通过调整焦距（focal length），摄影师可以控制场景中包含多少内容。这种放大或缩小的能力允许通过图像进行创造性的叙述。例如，摄影师可能选择广角镜头来捕捉风景的广阔，但切换到长焦镜头以专注于该风景中的特定元素，比如山峰或树木。总之，掌握焦距（focal length）的概念对任何有抱负的摄影师都是必不可少的。它不仅影响图像的构图和透视，还影响其传达的情感冲击。通过尝试不同的焦距（focal length），摄影师可以发展他们独特的风格，并通过视觉艺术增强他们的叙事能力。无论是捕捉广阔的风景还是亲密的肖像，理解焦距（focal length）无疑会将一个人的摄影技巧提升到新的高度。