teleconverter

简明释义

英[ˈtɛlɪkənˌvɜrtər]美[ˈtɛlɪkənˌvɜrtər]

n. 望远倍率镜

英英释义

单词用法

同义词

反义词

例句

1.Improved the focusing accuracy when using the EC-20 Teleconverter.

改进了对焦准确时，用欧共体20个镜头。

2.Palmer made this digital photo with a 500mm lens and a 1.4x teleconverter.

帕默用500毫米镜头和1.4倍的望远倍率镜拍摄的这张照片。

3.Palmer made this digital photo with a 500mm lens and a 1.4x teleconverter.

帕默用500毫米镜头和1.4倍的望远倍率镜拍摄的这张照片。

4.When photographing birds, I always bring my teleconverter for better zoom capabilities.

拍摄鸟类时，我总是带上我的增距镜以获得更好的变焦能力。

5.A teleconverter can reduce the amount of light entering the camera, so be mindful of your settings.

一个增距镜可能会减少进入相机的光线，因此要注意你的设置。

6.I decided to attach a teleconverter to my camera to capture the distant wildlife more clearly.

我决定在我的相机上附加一个增距镜，以更清晰地捕捉远处的野生动物。

7.The teleconverter helped me take stunning photos of the moon without needing a telescope.

这个增距镜帮助我在不需要望远镜的情况下拍摄出惊人的月球照片。

8.Using a teleconverter can effectively double the focal length of your lens.

使用增距镜可以有效地将镜头的焦距加倍。

作文

In the world of photography, achieving the perfect shot often requires a combination of skill, creativity, and the right equipment. One such piece of equipment that can significantly enhance a photographer's capabilities is the teleconverter. A teleconverter is an optical accessory that attaches to a camera lens, effectively increasing its focal length. This allows photographers to capture distant subjects with greater detail and clarity without needing to invest in a more expensive, longer lens.The functionality of a teleconverter is relatively straightforward. When mounted between the camera body and the lens, it multiplies the lens's focal length by a specific factor, typically 1.4x, 1.7x, or 2x. For instance, if a photographer uses a 100mm lens with a 2x teleconverter, the effective focal length becomes 200mm. This multiplication of focal length is particularly beneficial for wildlife and sports photographers who often find themselves shooting from a distance. The ability to zoom in on subjects without physically moving closer can be crucial in capturing fleeting moments.However, using a teleconverter does come with its challenges. One notable downside is the potential loss of light. Since the teleconverter is placed between the lens and the camera, it can reduce the amount of light that reaches the camera sensor. For example, a 2x teleconverter may reduce the lens's maximum aperture by two stops. This means that a lens with an f/2.8 aperture may behave like an f/5.6 lens when a 2x teleconverter is used. As a result, photographers may need to adjust their exposure settings, which can be particularly challenging in low-light situations.Another consideration is the impact on image quality. While many modern teleconverters are designed to maintain high optical performance, some may introduce distortion or reduce sharpness. It’s essential for photographers to choose a high-quality teleconverter that is compatible with their lens to minimize these issues. Additionally, using a teleconverter can affect autofocus performance, especially with certain lenses. Some cameras may struggle to achieve accurate focus when a teleconverter is in use, particularly at longer focal lengths.Despite these challenges, the benefits of using a teleconverter often outweigh the drawbacks for many photographers. It provides a cost-effective solution for those looking to extend their reach without purchasing additional lenses. Moreover, it offers the flexibility to experiment with different focal lengths, enabling photographers to explore various creative possibilities.In conclusion, a teleconverter is an invaluable tool for photographers seeking to enhance their shooting experience. By understanding its functionality, advantages, and limitations, photographers can make informed decisions about when and how to use a teleconverter effectively. Whether capturing majestic wildlife from afar or photographing athletes in action, the teleconverter can be a game-changer in achieving stunning images that tell compelling stories. Therefore, incorporating a teleconverter into one's photography toolkit can open up new avenues for creativity and expression, making it a worthy investment for both amateur and professional photographers alike.

在摄影的世界中，获得完美的拍摄效果通常需要技巧、创造力和合适的设备的结合。其中一种可以显著增强摄影师能力的设备是延长镜。延长镜是一种光学配件，可以附加到相机镜头上，有效地增加其焦距。这使得摄影师能够在不需要投资更昂贵、更长的镜头的情况下，以更大的细节和清晰度捕捉远处的对象。延长镜的功能相对简单。当它安装在相机机身和镜头之间时，它将镜头的焦距乘以一个特定的因子，通常为1.4倍、1.7倍或2倍。例如，如果摄影师使用100mm的镜头，并且配备2倍的延长镜，那么有效焦距将变为200mm。这种焦距的乘法对于野生动物和体育摄影师尤其有益，他们经常发现自己在距离较远的地方拍摄。能够在不物理靠近对象的情况下放大拍摄，对于捕捉短暂的瞬间至关重要。然而，使用延长镜也带来了一些挑战。其中一个显著的缺点是可能会导致光线损失。由于延长镜位于镜头和相机之间，它可能会减少到达相机传感器的光线量。例如，一个2倍的延长镜可能会将镜头的最大光圈减少两个档位。这意味着一个f/2.8的镜头在使用2倍延长镜时可能表现得像f/5.6的镜头。因此，摄影师可能需要调整曝光设置，这在低光环境中尤其具有挑战性。另一个考虑因素是对图像质量的影响。虽然许多现代延长镜设计旨在保持高光学性能，但某些产品可能会引入畸变或降低清晰度。摄影师选择与其镜头兼容的高质量延长镜以最小化这些问题是至关重要的。此外，使用延长镜可能会影响自动对焦性能，尤其是与某些镜头一起使用时。某些相机在使用延长镜时可能难以实现准确对焦，特别是在较长的焦距下。尽管存在这些挑战，许多摄影师发现使用延长镜的好处往往超过缺点。它为那些希望在不购买额外镜头的情况下扩展拍摄范围的人提供了一种具有成本效益的解决方案。此外，它还提供了实验不同焦距的灵活性，使摄影师能够探索各种创意可能性。总之，延长镜是摄影师寻求提升拍摄体验的宝贵工具。通过理解其功能、优点和局限性，摄影师可以就何时以及如何有效使用延长镜做出明智的决策。无论是从远处捕捉壮丽的野生动物，还是拍摄运动员的动态，延长镜都可以在实现引人注目的图像方面发挥重要作用。因此，将延长镜纳入摄影工具包中，可以为创造力和表达打开新的途径，使其成为业余和专业摄影师值得投资的设备。