Direct 72mm mount.  Includes 72-72mm ring FOR Panasonic 173/260/180/130 etc. Includes 72-82mm ring FOR Panasonic 203/200 etc. HD super anti-reflective scratch resistant multicoated glass optics for sharper images Built tough withstand extreme usage. All-metal body, mount, rings and hood Produces an extraordinary degree of barrel distortion resulting in a 180 degree angle of view Exaggerates depth, pulling nearby objects closer and causing distant objects to recede into the background THE panasonic 173 IS NOT INCLUDED. ONLY THE FISHEYES LENS/BAG/72-72mm ring and 72-82mm ring INCLUDED.