An accent that matches between a digital camera and lens to increase the focal length of the connected lens, typically by 1.4x or 2x. Tradeoffs generally embody less gentle transmitted, poorer picture quality, and slower autofocus. Also often identified as flash sync velocity, this is the maximum shutter pace a camera can use whereas nonetheless synchronizing with an exterior flash unit. If shutter pace is ready any faster than this limit, the camera’s shutter won’t fully open before the flash has completed its exposure, causing a dark band within the picture. The sync velocity can range depending on the digital camera and flash setup however is typically around 1/200 to 1/250 of a second.
