Intensity

in⋅ten⋅si⋅ty [in-ten-si-tee]
–noun, plural -ties.

1. the quality or condition of being intense.
2. great energy, strength, concentration, vehemence, etc., as of activity, thought, or feeling: He went at the job with great intensity.
3. a high or extreme degree, as of cold or heat.
4. the degree or extent to which something is intense.
5. a high degree of emotional excitement; depth of feeling: The poem lacked intensity and left me unmoved.
6. the strength or sharpness of a color due esp. to its degree of freedom from admixture with its complementary color.
7. Physics. magnitude, as of energy or a force per unit of area, volume, time, etc.

Canon 5D Mark II, Canon 70-200 f/4L lens - 1/160 second, f/5, ISO 100