18 frames per second. A slightly archaic notion left over from the time when 16mm was used exclusively for home movies. It is not always that easy to find a projector that will project at 18 frames per second and so films shot at silent speed will often be speeded up slightly, whether the filmmaker intended this of not.thepolliofolioglossaryofcinematographyterms
This term is often a little confusing because it does not mean a camera that is itself silent, and therefore usable for sync sound, but it means a noisy, unsilent camera, usable only for shooting silent, M.O.S. scenes.
AKA: SilentA film that has no synchronized soundtrack and no spoken dialogue. It was a form predominate in film until the late 1920 s when practical synchronized soundtrack technology was developed and its use became popular. See also intertitles.On the web: List of silent titles at the IMDb.
The mirror remains up and the shutter stays open during live view photography for less noise than Quiet mode. In silent mode, the flash will not fire and image quality is fixed at JPEG fine with Optimal quality selected for JPEG compression.
Certain 1 NIKKOR lenses utilize Silent Stepping Motor Control which means the lens is quiet when zooming, ideal for use when shooting videos with sound.
AF-S NIKKOR lenses feature Nikon’s Silent Wave Motor (SWM), which represents a significant advance in AF lens technology. SWM uses ultrasonic vibrations—rather than a gear system—to focus the lens, providing incredibly smooth, silent and precise autofocus operation.