nominal aperture

简明释义

标称口径;标称宽度

英英释义

例句

1.When calculating exposure, it's essential to consider the nominal aperture of your camera lens.

在计算曝光时，考虑相机镜头的名义光圈是至关重要的。

2.To achieve a sharp focus on the subject, use a lens with a suitable nominal aperture.

为了确保主体清晰对焦，使用具有适当名义光圈的镜头。

3.A larger nominal aperture can produce a shallower depth of field, resulting in beautifully blurred backgrounds.

较大的名义光圈可以产生更浅的景深，从而使背景模糊美丽。

4.Photographers often experiment with different nominal apertures to achieve their desired artistic effect.

摄影师经常尝试不同的名义光圈以达到他们想要的艺术效果。

5.The lens has a nominal aperture of f/2.8, which allows for better low-light performance.

该镜头的名义光圈为f/2.8，这使得在低光环境下表现更佳。

作文

In the world of optics, the term nominal aperture refers to a crucial measurement that determines the light-gathering ability of a lens system. This concept is essential for photographers, astronomers, and anyone involved in the field of optical design. The nominal aperture is often expressed as a ratio, typically denoted by the letter 'f' followed by a number (for example, f/2.8). This ratio indicates the diameter of the entrance pupil of the lens relative to its focal length. A lower f-number signifies a larger nominal aperture, allowing more light to enter the lens, which is particularly beneficial in low-light conditions.Understanding the significance of nominal aperture can greatly enhance one’s ability to capture stunning images or observe celestial bodies with greater clarity. For photographers, a lens with a larger nominal aperture not only allows for faster shutter speeds but also creates a shallow depth of field. This effect is highly sought after in portrait photography, where the subject is sharply focused while the background is beautifully blurred. Consequently, mastering the use of nominal aperture can elevate the quality of one’s photographic work.In astronomy, the nominal aperture of a telescope plays a vital role in determining how much light the instrument can collect from distant stars and galaxies. Telescopes with larger nominal apertures can reveal fainter objects in the night sky, making them invaluable tools for stargazers and professional astronomers alike. The ability to gather more light not only enhances visibility but also improves the detail and resolution of celestial images. Therefore, when selecting a telescope, one must consider the nominal aperture as a key factor in their decision-making process.Moreover, the nominal aperture is not merely a technical specification; it embodies the relationship between light and perception. In the realm of visual arts, understanding how different apertures affect light and shadow can inspire creative choices. Artists and filmmakers often manipulate lighting conditions to evoke specific moods or highlight particular aspects of their subjects. By experimenting with various nominal apertures, they can achieve unique visual effects that captivate audiences.In conclusion, the concept of nominal aperture serves as a fundamental pillar in the study of optics. Whether one is a budding photographer, an amateur astronomer, or a visual artist, grasping the implications of nominal aperture can lead to a deeper appreciation of the interplay between light and vision. As technology advances and new optical systems are developed, the importance of understanding nominal aperture will continue to resonate within these fields. Therefore, it is imperative for anyone interested in optics to familiarize themselves with this essential term and its applications, as it holds the key to unlocking the beauty and intricacies of the visual world around us.

在光学领域，术语名义光圈指的是一个关键的测量值，它决定了镜头系统的光收集能力。这个概念对于摄影师、天文学家以及任何参与光学设计的人来说都是至关重要的。名义光圈通常以比率的形式表示，通常用字母'f'后面跟一个数字（例如，f/2.8）来表示。这个比率表示镜头的入射瞳孔直径与其焦距的比例。较低的f值意味着较大的名义光圈，允许更多的光线进入镜头，这在低光条件下尤其有利。理解名义光圈的重要性可以大大提升人们捕捉惊人图像或观察天体的清晰度。对于摄影师来说，具有较大名义光圈的镜头不仅允许更快的快门速度，还能创造出浅景深。这种效果在肖像摄影中备受追捧，在这种情况下，主体清晰对焦，而背景则美丽模糊。因此，掌握名义光圈的使用可以提升个人的摄影作品质量。在天文学中，望远镜的名义光圈在确定仪器能够从遥远的星星和星系收集多少光方面发挥着至关重要的作用。具有较大名义光圈的望远镜可以揭示夜空中更加微弱的物体，使其成为天文爱好者和专业天文学家的宝贵工具。收集更多光线的能力不仅增强了可见性，还提高了天体图像的细节和分辨率。因此，在选择望远镜时，必须将名义光圈视为决策过程中的关键因素。此外，名义光圈不仅仅是一个技术规格；它体现了光与感知之间的关系。在视觉艺术领域，理解不同光圈如何影响光线和阴影可以激发创造性的选择。艺术家和电影制作人经常操控照明条件，以唤起特定的情绪或突出他们主题的特定方面。通过尝试各种名义光圈，他们可以实现独特的视觉效果，吸引观众。总之，名义光圈的概念作为光学研究的基本支柱。无论是初学摄影的爱好者、业余天文学家还是视觉艺术家，掌握名义光圈的含义都可以加深对光与视觉之间相互作用的欣赏。随着技术的进步和新光学系统的发展，理解名义光圈的重要性将在这些领域中继续产生共鸣。因此，对于任何对光学感兴趣的人来说，熟悉这一基本术语及其应用至关重要，因为它是解锁我们周围视觉世界之美和复杂性的关键。