In such a devastating light, try to make the portraits either in an open shade, or, ask the model to "flatten" the face towards the light, like this:
http://www.flickr.com/photos/micmojo/9625469422/
or this;
http://www.flickr.com/photos/micmojo/9709643435/
Rolleiflex 3.5F Planar.
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Yashica Mat 124G + Arista EDU Ultra 100