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English to Chinese: How to Create the 'Vertigo Effect' Dolly Zoom—Without a Zoom Lens如何在没有变焦镜头的情况下实现眩晕效果的滑动变焦 General field: Art/Literary Detailed field: Photography/Imaging (& Graphic Arts)
Source text - English
The "Vertigo effect" gets the post-production treatment.
We've talked extensively about the dolly zoom over the years—everything from its evolution to mastering the dolly zoom timelapse. A visual storytelling technique in which the camera dollies toward or away from the characters while the zoom on the lens is pulled in the opposite direction, subjects framed by a dolly zoom will remain the same size while either the background grows in detail or the foreground becomes dominate, depending on the way the camera moves.
The effect was first seen in Hitchcock's Vertigo, but many have used it since—most notably,Steven Spielberg in Jaws, Martin Scorsese in Goodfellas, and Sam Mendes in Road to Perdition. You'll even see it in the upcoming film Arrival from Denis Villeneuve.
But what if you want to create the effect as an afterthought? Or you just don't have the proper lens while shooting?
Learn how to create this effect without the use of a zoom lens with UglyMcGregor, who breaks it down in the video below:
The setup
You're going to need a high-resolution camera that shoots at least 3K. 1080p media won't work, as you will be using the scaling method later in post to produce the effect. As McGregor points out, dolly zooms work best with the subject in center frame, so be sure you do so while tracking either toward or away from the subject.
In post
A program like After Effects, Premiere, Vegas, Final Cut, or Avid that has the ability to scale the size of the image will work for this technique. After placing the footage in the timeline, find the start and end points of the shot. From the starting point, if you moved the camera forward, you will descale the image using keyframes to control scale and speed. As you descale the image, your subject will move from middle frame, so it's preferable to use a thirds grid to help keep the character centered.
If you dollied backwards, you will increase the image size using the same technique as above. Keep in mind that while you will lose frame height and width using this technique, you can produce realistic results if you're in a pinch.
What do you think: Can you see yourself trying this out? Let us know in the comments below.
Translation - Chinese 眩晕效果得到了和后期制作一样的重视。
我们在这些年里大量谈及了滑动变焦，以及那些从中衍生的滑动变焦显微镜。当变焦镜头被推到相反方向时，讲述故事时的视觉技术就体现在摄影机滑动接近或远离人物的时候。由滑动变焦控制的主体画面在背景或前景强化是否会维持原有尺寸，这都取决于摄影机是如何移动的。这种效果是在希区柯克（Hitchcock）的《迷魂记》（Vertigo）中第一次出现，随后也广泛应用在史蒂文·斯皮尔伯格（Steven Spielberg）的《大白鲨》（Jaws），马丁·斯科塞斯（Martin Scorsese）的《好家伙》（Good fellas），山姆·曼德斯（ Sam Mendes）的《毁灭之路》（Road to Perdition）中。而且我们也将在由丹尼斯·维伦纽瓦（Denis Villeneuve）指导的即将上映的电影中看到。但是如果你只是想不假思索地实现效果该怎么样呢?又或是你在拍摄时没有合适的镜头？乌戈里·麦格雷戈（ Ugly McGregor）就在下面的视频里解决了这种困扰，所以我们跟着他学习下如何在没有滑动变焦的情况下实现这个效果。
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