Well, there you go then - 2 stops is far too much and problems like this are inevitable.I really need to buy that third head, but until then the only way to expose the whole background is to have it two stops brighter than the subject. So at the moment it's f/22 on the background and f/11 on the subject.
I always use 4 heads on this stuff.... 3 will pass but four 2x2 will get you good contrast and even light to the back.
1 light on the back you will over compensate by putting up the power to spread across the whole bg. 2 lights on the rear you can drop them down to 1/2 or one stop over the subject.
Hmm, isn't a bit of spill desirable? In that it provides a shape and definition to edges?
No.Hmm, isn't a bit of spill desirable? In that it provides a shape and definition to edges?
Maybe someone could explain exactly how they would of done this with just 2 heads?
Basically, you can do head and shoulders with just two heads, but for anything more you need three.
Problem is the background, which needs to be evenly lit all over, at an exposure just fractionally above that of the main front light. You can't get it even, over a large enough area for full length or group shots, without two lights.
Lots of threads on this style of lighting.
Edit: Of course you can give it a try, and if you're careful to minimise hot-spots and grey patches it can work. You can often mop up a little bit of grey around the edges in post processing. If you move the background light as far back as possible it will minimise fall-off across the background (inverse square law).
might be best i go to bed i aint gonna help anyone tonight