I knew that I wanted the copious light from the windows behind my subject as my main light, and I proceeded to set up a softbox as a fill.
I soon encountered one difficulty -- namely that I had forgotten to get a sync cord from the studio -- which effectively meant I had no way to fire my flash. Thankfully Val was on hand, and suggested I connect one of our sunpaks to my camera hotshoe, bounce it off the floor, and trigger the softbox that way.
I very quickly found that my artificial light sources were way too bright. To keep the ambient light from the windows in the background nice and distinct, and to keep my shallow(ish) depth of field, I needed to set my ISO to around 400, my aperture to 3.2 and have a shutter speed at around 1/125. This meant that the light on my model from the sunpak and softbox was way too harsh and over-exposed.
When I tried without the softbox, and simply bounced my on-camera flash off the floor, the results were much more satisfying and natural. I dropped my shutter speed to 1/60, and the image was much closer to what I'd been aiming for.
Val pointed out, however, that the light was quite flat.
So we took the softbox off the profoto, attached a reflector, extended it as high as it would go, and bounced it off the ceiling above.
This gave a more dynamic feel to the image, and a feeling of airy, lofty space above my model. As Val pointed out, because you can't actually see that there are not windows on the left side of the space, the eye is tricked into thinking the windows curve off out of the picture, and that my model is lit (naturally) from the left.
I took care of my white balance in post production. I did take a grey card on the shoot, but forgot to shoot with it. I always open my images in Lightroom, do white balance, exposure and curves there, and then open the image in Photoshop to do my retouching.
I do feel my shot might be a little bit grainy. Whether this is because of my ISO, or my aperture being just a little bit too wide, I'm not sure. There are other problems, like the blown out area in the bottom right corner, and my retouching is a little bit rough.
I'm also not too sure about the expression of my model. I had other shots where the expression is better, but could not use them, because of problems like: her hair on the right-hand side came up like brush underneath her chin -- it was too distracting, and there was no way I could easily retouch that kind of thing. Similarly with the hand: I had shots where the hand was placed better, but they didn't work for other reasons (expression, hair, etc.)
It just reinforces to me that shooting with Capture One on a location shoot (or any kind of shoot) is crucial. There is so much to think about in terms of just lighting a shot, that those smaller details can get lost in the process. Seeing the images blown up on a computer screen, however, would show those kinds of things right away.
Having said all that, I'm fairly happy with the results. I think it works well for the brief. The picture is definitely far from perfect, but overall, I'm really happy with what I learned on the shoot.