Have a natural light / dark hair / headshot issue

Firstly a starting image:

IMAGE IS A REDIRECT OR MISSING! HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO

Ahhh...the benefits of off-camera HSS ETTL flash. One of the main reasons I got my flex/mini.
But...your choices are, in my opinion...
A refelctor of some sort, hanging from above to direct a bit of light to her hair.
Maybe some reflectors on either side for the same effect.
You are trying to match the sun's output that you are using, in the shade. How about a worklight hanigng as a constant hairlight? Probably W/B issues, but if you convert to b/w it's not an issue.
Or just shoot blondes.

This image is underexposed a bit as well.

On the flash: This was shot at 1/500 sec, f/2, ISO 100
If you add a 1 stop ND (or a polariser) and use 1/125 to 1/200s; f/2, you have about correct exposure and can use flash

But I agree that reflectors are a way simpeler option.

Gel.. LOVE that first image.

But, yeah... go with a reflector, first. For a couple of reasons:
1) You'll need a reflector at other times. You should always have one.
2) A 5-in-1 reflector oughta be a lot cheaper than getting another flash unit.

Thanks guys,
This is the image I'm having trouble with, when I tried to put like on her it seemed to spill forward onto her face ruining the natural light look.
I should of tried using a gridded spot or a snoot I guess:

IMAGE IS A REDIRECT OR MISSING! HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO

René Damkot wrote in post #10650054
This image is underexposed a bit as well.

On the flash: This was shot at 1/500 sec, f/2, ISO 100
If you add a 1 stop ND (or a polariser) and use 1/125 to 1/200s; f/2, you have about correct exposure and can use flash

But I agree that reflectors are a way simpeler option.

Nicely thought out Rene