As I saw GEdgar's comment and agreed with it, I went and got some definitions:
3 . pan
To pivot a movie camera along a horizontal
plane in order to follow an object or create a panoramic effect.
To pivot (a movie camera) in a specified direction.
pivoting movement of a movie camera.
American Heritage Dictionary
(Film) to move (a film camera) or (of a film camera) to
be moved so as to follow a moving object or obtain a panoramic
a. the act of panning
modifier): a pan shot.
Collins English Dictionary
: to rotate (a camera, such as a motion-picture camera) so as to keep an object in the picture or
secure a panoramic effect
1 . with object and adverbial of direction
Swing (a video or film camera) in a horizontal or vertical plane, typically to give a
panoramic effect or follow a subject.
1.1 no object, with adverbial of direction (of a camera) be swung in a horizontal or vertical plane.
Oxford Living Dictionaries
Camera panning Wikipedia article
Sorry, I may have lost my train of thought while copying and pasting, what you're looking for is "pan" as a noun, which is how it's used in your example. Note the two "A pivoting movement of a movie camera." and "Act of panning."