Large Focal Length compresses depth


camera的镜头随着focal length的增大,景象会被放大,同时,depth也被压缩了。跟调整aperture的效果不一样。

而且,一般照相的时候,应该使用的大的focal length, 然后离目标远一些,这时照出的效果好些,如图6.2,使用210mm的镜头。使用50mm的镜头照出来的效果有distortion,如图6.1. 这是因为,小的focal length等于拉长了depth,增加了projective的效果,使照片看的邪恶些.所以,下次照相的时候想整人的话,就使用小的focal length镜头. 

 

Fun With Focal Length! by Jim Sherwood

http://www.hash.com/users/jsherwood/tutes/focal/focal.html

3 thoughts on “Large Focal Length compresses depth

  1. Xiaoyan

    以后Andy再放这种恐怖图片,影响欧们睡眠;偶们就在晚上的时候给Andy发好吃的东西的照片~~
    偶们被吓死,他被馋死~~还算公平…
    哈哈~~  : P

    Reply

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s