I'm hoping there is someone here who owns the same equipment and who has already solved this problem.
As the topic indicates, I have a Canon 20D and the 580EX flash for it. The manual says that the flash will sync with shutter speeds up to 1/8000 if I enable the MULTI feature. I have set the flash to MULTI as indicated by the manual, but I am not able to dial the camera over 1/250 second in the following modes:
The camera always reverts back to 1/250 as the highest possible speed. The manuals for the camera and flash are useless here, and say nothing other than giving me settings to use that don't work. I've set the Av sync speed to both 1/250 and AUTO in the camera's custom functions, but neither works.
Can anyone recommend something that I've overlooked? I bought this flash because it was the most powerful high speed sync flash that Canon offers and I want to use it outdoors for fill flash in bright light.
All advice will be gratefully accepted.