In a camera, flash synchronization is defined as the firing of a photographic flash coinciding with the shutter admitting light to photographic film or electronic image sensor. It is often shortened to flash sync or flash synch.
In mechanical cameras, the synchronization mechanism usually consists of an electrical contact within the shutter mechanism. In electronic digital cameras, the mechanism is usually a programmable electronic timing circuit, which may take input from a mechanical shutter contact in some cameras. The electrical connection will be either by means of a cable with a standardised coaxial PC (for Prontor/Compur) 3.5 mm (1/8") connector (as defined in ISO 519), or via contacts in an accessory mount (hot shoe) bracket.
In general, faster flash sync speeds, usually rated in fractions of a second, are better if the photographer needs to flash-fill subjects that are backlit and wants to avoid motion blur, or wants to increase depth of field by using a high aperture.
In a camera, flash synchronization is defined as the firing of a photographic flash coinciding with the shutter admitting light to photographic film or electronic image sensor. It is often shortened to flash sync or flash synch.
In mechanical cameras, the synchronization mechanism usually consists of an electrical contact within the shutter mechanism. In electronic digital cameras, the mechanism is usually a programmable electronic timing circuit, which may take input from a mechanical shutter contact in some cameras. The electrical connection will be either by means of a cable with a standardised coaxial PC (for Prontor/Compur) 3.5 mm (1/8") connector (as defined in ISO 519), or via contacts in an accessory mount (hot shoe) bracket.
In general, faster flash sync speeds, usually rated in fractions of a second, are better if the photographer needs to flash-fill subjects that are backlit and wants to avoid motion blur, or wants to increase depth of field by using a high aperture.