kevinteh wrote:
I've seen some commercial photographer doing portrait shoot in shopping complex with two light boxes setup and the studio light was trigger by this ST-E2. I am planning to setup a similar studio lightning system. I know I can also trigger the studio flash with my 550ex but I hope not to do it this way as the flash from my 550ex will affect the picture.
Look, there are only a few ways to trigger studio lights. You can use the Canon IR wireless flash system with masters and slaves. Or, you can use straight cable. Or, you can use primary flashes and optical slaves. Regardless of what you saw, those are the ways.
Now, the commercial photographer may have had the ST-E2 on his camera and then it was two Canon slaves being coupled by Canon IR wireless. Or, maybe he had the ST-E2 on the camera and one Canon slave coupled by Canon IR wireless... and then the studio lights were optically slaved off the one Canon light. Then there are other contortions of that.
So, let me ask my question again. What function of the ST-E2 do you intend to use?
---Bob Gross---