大M曝光換算器

大M曝光換算器主要用於夜間攝影及在 M 模式下，求得測光點之正常曝光所需的快門時間。
使用上，只需要依 APP 內部說明操作，無任何複雜操作，方便使用。

備註：工具只是輔助，好的照片仍然需要用心。 Big M exposure converter is mainly used for night photography and in M ​​mode, to obtain normal exposure metering point desired shutter time.
Use, only need to explain the internal operation according to APP, without any complicated operation, easy to use.

Note: only an auxiliary tool, a good photo still needs careful.