22nd October 2009, 12:03 AM
Re: Flash firing
Please read again your manual (thoroughly) and also please describe clearly which button you are pressing and also which camera you are using. It helps a lot since the art of mind reading is not very common.
Originally Posted by LArdius
In case you have a Canon camera then spheredome has given you the answer, the respective chapter in the manual is label "FE lock" (e.g. for 450D on page 89). Since it's just a brief burst with reduced power you can repeat the function faster.
Second curtain flash can be set in Custom Functions. For firing a flash somewhere in between during any bulb exposure you will need an external flash. That's beyond the scope of the onboard flash.