[BIGBUS]

想買個閃光燈，原廠580EX II相對昂貴D，新的副廠閃燈Nissin Di866平1/3價錢，師兄們覺得值不值得購買? Nissin Di866質素好不好?

[Obi-Wan]

副廠 is good for amateur use only

Also need frequent firmware upgrade in order to be used in future CANON DSLR, e.g. many 副廠 flashes use perfectly on 40D cannot work on 5D2

If no $ why not buy 2nd hand 550EX or 580EX?

Some brother said a 2nd hand flash may have shorter life than a new one, YES, this is true, but modern Xenon flash bulb can be used over 50000 flashes.

[kck_charles]

Have upgrade the firmware EF-500DG Super EOS-ETTLII but still unable to function perfectly. Speedlite setting cannot be done directly from the 5DII. After purchased the 580EXII the problem sloved herefore Canon might be better.

[BIGBUS]

多謝師兄們的建議，我要重新考慮了。