What do you mean "off-axis"?

"Off-axis" in photography means that if you don't pay attention to the moving direction of the object or shake the lens around, the resulting lens will cause confusion in the moving direction, line of sight direction or positional relationship between characters on the screen.

"Off-axis" is a taboo in shooting. In reality, once an "off-axis" lens is accidentally produced in shooting, later editors should find ways to make up for it. However, some people deliberately use off-axis lenses in shooting to produce some special effects. Reasonable "off-axis" is to establish a new axis, obtain rich and varied screen styles and realize the processing and performance of screen reconstruction space.

Extended information:

There is a rule in film and television space processing: when shooting at different angles, the camera can not cross the axis at will, but can only shoot within 18 degrees on one side of the axis. When shooting TV programs, the cameraman must establish axis consciousness and follow axis rules when dealing with lens scheduling, which is the basic condition for forming a sense of unity in picture space and consistency in visual orientation.

In the creation of TV programs, if the cameraman sets up the axis consciousness and grasps the rules and essentials of using the axis, in the actual shooting, he can use the axis to shoot the required lens picture flexibly and freely, so as to avoid the phenomenon of "jumping axis" in the later assembly of various lenses of the object to be represented, realize the complete unity of the lens picture in position, direction and space, and create excellent TV programs with various screen forms that meet the audience's perceptual requirements.

Reference:

People's Daily Online-the principle of "on-axis" and "off-axis" in TV shooting

Baidu Encyclopedia-off-axis.