compact remote switch with all functions of the camera's shutter release
button. Particularly important to avoid camera moving, making it
convenient and easy to use when taking long exposure photos.
Half press on the shutter button will cause the camera to focus, full
press will trigger the shutter and cause the camera to take a photo. For
long exposures, press the release button completely and slide it in the
direction of the arrow to lock the button in the depressed position. To
unlock the button, slide it back to its original position.