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A digital single-lens reflex camera (also called a digital SLR or DSLR) is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film.
What is High Speed Sync Flash? High-speed sync flash is your DSLR's ability to use a flash at shutter speeds faster than the cameraâs native sync. Most cameras have a native sync of 1/250th of a second, and anything faster than that is beyond the camera's ability to sync the shutter with the flash.