[SAS_Sniper]

我用開AV mode拍攝，不過點都set唔到先曝光後閃呀! 最多都係先閃一下>曝光>再閃多下咋....

請問點樣可以set到先曝光，之後才閃燈呀?

thanks!

[micros]

唔係係枝 flash 到 set 咩﹖

[SAS_Sniper]

支燈度set會閃兩次ga!

[micros]

e-ttl o既 pre-flash﹖

[prelude88]

Hi , the function is called second flash synchronization, simple press the <<< and the >>> button at the same time. then it will switch on that mode ga la..
please read your menu for details.

[louisho]

Micros was right. The reason you see it flashed twice is because of the E-TTL pre-flash. This is normal if you are using E-TTL with Second Curtain Synchronization Flash.

How E-TTL works is that it will fire a pre-flash to get a flash exposure reading before the shutter is opened with the actual flash. Even if we take a picture with flash normally or with first curtain sync. flash, it still flashes twice. However, the time gap in between is too short for us to notice. With second curtain, we usually set the shutter slower than normal and it will be more noticable.

You may go to this site for more information about using Canon flash.
http://photonotes.org/articles/eos-flash/index.html