This image was shot with an Olympus E-30 and 50-150mm (100-300mm equivalent) f/2.8-3.5 telephoto zoom lens. Settings, ISO100, 50mm (100mm equivalent) focal length, aperture-priority automatic at f/2.8. Shutter speed was 1/50 second. Minor tweaking in Lightroom, including a -13 post-crop vignette.
The eyes are near the horizontal centre-line. The left eye is almost dead-centre and our first point of focus. The right eye is somewhere near the third-line. Mostly, the eye is held by the model’s gaze; the out-of-focus background directs us back to the in-focus face and the stray wisps of hair accentuate the difference between subject and bokeh.