[FaFaChen]

如用B快門，怎樣準確計算曝光時間來配合ISO值和光圈呢？請各位C Hing分享經驗，Thanks

[tcfreeman]

use a hand-held light meter

[FaFaChen]

Thanks

[khadafy]

如沒有手持測光表...自已可製作一個換算表..

表例....
ISO100
---------------------------------------------
4秒｜ F4 F5.6 F8 F11
--------------------------------------------
2秒 ｜ F2 F4 F5.6 F8
----------------------------------------------
EV ｜ 1 2 3 4
---------------------------------------------
1秒 ▕ F1.4 F2 F2.8 F4
--------------------------------------------
1/2秒｜ F1.4 F2 F2.8
---------------------------------------------
1/4秒｜ F1.4 F2
---------------------------------------------

[lewealace]

khadafy ching, how to use the table to calculate ar?

[khadafy]

khadafy ching, how to use the table to calculate ar?
--------------------------------------------------------------------------------

(測光用18%灰咭作標準)

當EV1時....iso100 = 用1秒快門夾上1.4光圍=正確曝光,

如此類推.....