The KIWIFOTOS LA-72HX300T Lens Adapter is a two piece adapter (back component & front component) made of black anodized aluminum. The lens adapter provides 72mm filter mount for adding effects filters or other lens accessories to the SONY DCS-HX300 Digital Camera.
With the back component of the adapter users can add a 72mm  filter to improve picture quality at widest zoom and it will not cause vignetting,In this case lens full zoom function is not applicable .For use tele-converter and macro/close up lenses in full zoom screw both parts together and add a 72mm filter ,it may cause vignetting ,however ,Tum the adapter gently in order user to zoom the lens manally.The lens adapter will protect your camera lens when the lens is extended.