Subject Distance = 4 feet, F22 有必要

来源: MichaelC 于 2011-08-11 09:56:49 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (463 bytes)
回答: 怎么算的？ 由 吉火 于 2011-08-10 15:45:01

I didn't pay much attention to the subject distance before. The calculation shows a big difference between 4 and 6 feet. If the subject distance is 6 or 10 feet or further away, focul length is close to 24mm, the aperture can be kept close to F11 and still maintain an infinite DoF. This means use wide angle first and crop later. It also means keep the main subject some distance away.

Wow, this is very useful. Thanks for the link!

所有跟帖： 

• subject distance并不是景深范围 -云漫- ♂ 给 云漫 发送悄悄话 云漫 的博客首页 (250 bytes) () 08/11/2011 postreply 11:48:10

• 明白了。关键是花儿太靠前，6-10Ft左右没有景物做Focus咋办？谢谢 -MichaelC- ♂ 给 MichaelC 发送悄悄话 MichaelC 的博客首页 (0 bytes) () 08/11/2011 postreply 16:03:56

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