The P100 2-in-1 Accessory Mount from Fiilex is designed to adapt the P100 to accept the Fiilex Dome Diffuser and Gel Holder accessories, as well as the 4-Way Barndoors for the P180. It fits tightly around the outside of the P100 lens and is held in place by tension. The barndoors slide on easily and the other accessories attach magnetically to the face of the P100 Accessory Mount. The P100 Accessory Mount is not meant for use with the Fresnel Lens as it already has a focusing lens on the light unit.