How finely motion is captured — defined by framerate, shutter speed, and sensor precision. 24p/180° shutter is standard; 48p+ needed for action.
Temporal resolution determines how finely you render motion—not spatially, but over time. You decide it through three parameters: framerate, shutter angle, and the sensor's reaction to rapid changes. On set, this isn't a theoretical concept—it dictates whether your action appears fluid or choppy, whether pans are elegant or jerky.
The standard for decades: 24 frames per second with a 180° shutter angle. This results in approximately 1/48th of a second exposure per frame—a proven ratio that renders motion naturally without appearing too harsh. The 180° rule is firmly established: a 180° opening angle corresponds to half the framerate as exposure time. Soft focus, motion blur—organic. This is precisely why cinema looks like cinema.
But: Fast movements—chase scenes, fight choreography, quick cuts—demand higher resolution. You switch to 48p, 50p, or 60p, sometimes even 120p. Each frame captures a shorter time span, rendering motion in greater detail. Peter Jackson did this for The Hobbit with 48p—polarizing, but technically: more temporal information per second. In action films, especially with high-speed camera work, this is standard.
At the same time, you must adjust the shutter angle. If you stick to 180° and increase the framerate, your image becomes brighter and motion blur decreases—sometimes appearing too plastic, too video-like. Many DoPs keep the shutter speed constant (1/48s at 24p = 180°, but 1/96s at 48p = 90° angle) or opt for a compromise: 24p at a 90° shutter for deliberate flicker risk with fluorescent lights, or a variable shutter on digital cameras.
In the edit, you immediately feel temporal resolution: low-frame footage (18p-24p with long shutters) cuts elegantly, cinematically. High-frame footage (60p+) allows for aggressive slow-motion without artifacts. Modern cameras like the RED Komodo, Alexa 35, FX30 give you full control—you choose, not the sensor. Crucial for VFX: higher framerate = more accurate motion tracking. Also relevant for grading—more temporal information means smoother motion interpolation in color correction when you adjust timing afterward.