我想知focal length點搵??
謝謝!!!
^^
phy focal length
2008-04-18 6:33 am
回答 (1)
2008-04-18 9:52 am
✔ 最佳答案
So=subject distance from the lensSi=Subject distance from the lens
f=focal distance
So^-1+Si^-1=f^-1
f=1/(So^-1+Si^-1)
f=1/((Si+So)/(So*Si))
f=(So*Si)/(Si+So) <---- here is you go~~
here is your equation~~
參考: myself
收錄日期: 2021-04-24 10:52:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080417000051KK02865