Photographers love bokeh. It's that special way a lens renders the out of focus area of an image. We use shallow depth of field to bring attention to one part of our work and to dissolve distraction away from the viewers gaze. The word bokeh comes from the Japanese word ボケ which should be read as bo-ke. It translates as blur, haze, however, in the right context can also be used as mental haze, craziness, senility.
A few of my first images using the Sigma 50mm f1.4 Art lens. It's the only lens I have that fits the Nikon and I'm going to keep it that way for a while to really get to know it well.