Black Swan Dance Scene Analysis;

(4.13 - 7.34)

The majority of the shots in this dance scene (White Swan character) focus on showing Nina's (Natalie Portman) face rather than the rest of her body, which is not typically expected of a dance sequence as the majority of movement comes from the dancers feet.
The cinematography of the sequence is heavily based on mid shots of Nina's facial expressions and arm movements. Her expressions have quite a subtle contrast to her body movements; her expression is always poised and focused whereas her motion is far more fluent and flows with the music. I believe this is done to show the personality of the character of the "White Swan", she is calm in appearance yet stern within thought. The first part of the dance shows her being cautious of a male and then slowly giving into his charm, the second half of the scene however shows her dancing in sync with the male but then her body movements become stiffer and much more disciplined as she begins to be drawn into temptation by the black male swan thus leading to her portrayal as the Black Swan.

(9.40 - 12.14)
The camera, although still mainly positioned in a mid-shot, is far less motionless as the first dance scene. The camera continuously tracks back and around the dancers on the stage as the dance becomes more and more abrupt.
Nina's arm movements are much more structured as well as her expression, the dance style has changed with the music playing along side also as her character is now joining "the dark side".