to blow out the background you need your background lights to be at least 2 stops over your key light
so you might be best off using your elinchroms to blow the background and the speedlights as the main lights
but you dont want your back lights too much over the top otherwise you will start getting light wrap which can look bad so basically you want some control. A light meter is an easy way to tweak all this when you are starting out but after not a very long period of time you just know what setting will get you in the ballpark and then its just fine tuning tweaks.
read this in detail and all will become clear
Thank you very much!
How do I shoot off the elinchrom AND the speedlights at the same time? I have an ST-E2 that I have used on my four speedlights (600 RT EX, 2x 580 EX II, and a 430 EX II). Now with the Elinchrom I have another remote control on top of camera to trigger the strobes. Can I use that to set off my flashes, or can I use the ST-E2, or the 600 RT EX (without actually shooting light from this) as a remote for both the elinchrom strobes and my non-radio canon speedlights? I am guessing that ST-E2 on top of my camera, and the remote trigger for the elinchrom in my hand shooting off the same time is too hard?
the easiest way is to fire the speedlights with your st-e2 and enable the optical slave on the elinchrom units
check the manual for the heads you have but it should be the button with a picture of an eye then the elinchroms will detect the speedlights firing and fire themselves when they see the flash
forget the elinchrom trigger here unless you also have the expensive elinchrom recievers which can be plugged into your speedlights
Thanks Will T
Wickidwombat.. I will go straight to the studio to check it out now. Thanks a lot for your advice I will report if I manage this