Hi Guys.
It seems like my two 5DMK1 bodies that I use for weddings are early release and I'm just wondering if there is any way around of sorting them out, for example, to use the camera in AV mode while the flash is in Manual or the the other way around.
Here is some text that explains my issue better:
The issue here is the combination of a Manual flash setting with Aperture Priority on a relatively older EOS camera. Hi-Speed sync is not directly involved. If you had used an EOS-1D Mark III, 40D or any other EOS model introduced since 2007, and set up the camera and flash the way you describe, the shutter speed would have been set by the camera to expose the ambient light properly. But, with any EOS camera introduced before 2007, including the original 5D which came out in 2005, manual flash settings should not be used in either Av or P modes. If you try to do so, the camera will set the shutter speed to either maximum X-sync if High-Speed sync is turned off, or the fastest shutter speed on the camera if High-Speed sync is turned on. This is what happened to you. If you stick with your original 5D, there are two alternatives to consider.
If you want to use Manual flash, you need to set the camera to Manual mode as well.
If you need to set an AE mode on the 5D, such as Aperture Priority, you need to set the 580EX II to E-TTL mode, i.e., automatic flash exposure.
Both methods will work with or without Hi-Speed sync. If you update your camera to any EOS model introduced since 2007, then you can combine Manual flash settings with AE modes on the camera.
Thanks.
Nikolay.
