菜鸟问个关于景深的问题（增加对比照片在47和55楼）~~~

tintin在法国

光圈、焦距和物距，景深的三要素。

还有人说画幅也决定景深，这个我到不觉得。

lshen

看一个摄影教材上说,小景深=大光圈+长焦+短摄距

问题是,拍同样构图的画面,用长焦则不用距被摄物太近,而短 ...
sf_peng 发表于 2010-6-5 22:34

General of brigade, you are totally lost.

lshen

那你这个副营长给俺讲解讲解呗。。
sf_peng 发表于 2010-6-5 23:10

你需要的不是讲解，你需要的是实践。
自己拿长焦和广角拍两张就明白了。

lshen

因为我看的那个教材上，说长焦和短物距会得到小景深。

我主要是想知道，如果拍摄同样构图的物体（画面中 ...
sf_peng 发表于 2010-6-5 23:19

你既然这么执着，那就陪你多扯一下。
两张片子，你自己去想吧。第一张，小广角；第二张，中长焦。

lshen

回复  lshen

你拍这2张照片的时候，相机和你的ipad之间的距离是一样的吗？ ...
sf_peng 发表于 2010-6-5 23:41

Come on, Dude! Wake up!

lshen

我知道，如果画面一样的话，肯定是用长焦的那个物距更长。

所以才不明白长焦和长物距，哪个起作用更明显 ...
sf_peng 发表于 2010-6-5 23:47

As you said, there are three parameters which can have influence on the depth. Of course, you can try to adjust any of them to realize your goal. I don't know exactly which one is the most important thing. My opinion is your question make no sense.
Except for depth,  there are still many other things to be considered for your photo. One quite simply sample is that if you get the same depth by the different lens, the distortion of the picture is absolutely different. Can you accept such kind of difference?
Ok, memorize this famous saying: "Only in the state does man have a rational existence."

lshen

回复  lshen

为啥一会儿英语一会儿中文呢。。。
sf_peng 发表于 2010-6-6 00:06

God bless. I knew less dirty word in English.