Tiffen 77mm ND9 Filter
77mm Screw-On ND
Reduces the amount of light passing through the camera lens without changing the color of the scene. This filter is especially useful in bright light conditions. Allows proper exposure at a wider lens opening when reducing depth of field to highlight a key subject by making the foreground and/or the background out of focus. A slower shutter speeds can be used to produce blurred motion effects.