High Speed Flash sync

<p>I have a 7d body and a 580 speedlight. When I shoot birds I shoot at the highest shutter speed I can manage. I normally set my flash to high speed sync and I can get a burst of light at 1,000 of a second.This spring My flash will not fire at faster than 1/250 of a second. I checked with the Canon representatives at their booth at the Migration Festival at Point Pelee. They emiled head office and the answer came back that a 7d body was not designed to sync at faster than 1/250 of a sec in Aperture Priority mode. Checked with the Canon expert at Henry's in Windsor ON,same answer. <br />I did it last year and if I knew how I could post the EXIF data from shots I took last year showing flash fired at 1/1000 of a sec. I know I was in aperture priority because that's the way I shoot birds. </p>

<p>Earlier bodies had a CF setting that set the shutter speed at 1/200 when using flash. The menus and CF for the 7D have changed when compared to older bodies but I'd look for such a function in the menus.</p>

<p>Make sure that Custom Function 1-7 is set to Auto. Then, with the flash attached and turned on, go to the flash menu on the camera and choose Shutter Sync. Set that to High Speed Sync.</p>

<p>Jos & Jeff ,Thanks for your help.<br>

Jeff, your solution worked perfectly. I really appreciate It. I posted a thank you two days ago but for some reason it was not sent. </p>