The C100 Z-Finder is an optical viewfinder, specifically designed to attach to the Canon C100 cinema camera LCD. This Z-Finder will magnify the LCD screen by 1.8x and has a diopter for specific focus tuning. It cuts out any extraneous light and offers an initial point of stability by pressing your eye against the large eyecup. The C100 Z-finder comes with a 40mm diameter Zacuto optical lens, anti-fog coated protective covers, and all necessary additional accessories for the Canon C100. The diopter allows you to dial in the focus to match your eye. If you need extra focal points you can use the included Z-Finder Extender Frames. These are semi-permanent stackable frames that attach to the body of the Z-Finder and extend the Z-Finder glass further away from the LCD screen for people who are farsighted. The C100 Z-Finder is comprised of three important parts. The first is the viewfinder itself with the lens, diopter, and eyecup. The second is the mounting system. The mount slides onto the Canon C100 LCD screen when articulated. The viewfinder snaps on and off the frame and can hang around your neck on the included lanyard when not in use. The third part is a set of Z-Bands that attach to your camera via a screw hole on the film panel included on the left side of the camera and then clip into two ball sockets on the Z-Finder itself. These Z-Bands add tension and support to the mount so the LCD screen and viewfinder can be set at any angle. Without the use of the Z-Bands, the hinge on the LCD screen cannot support the viewfinder (in any tilted up positions). The C100 Z-Finder is specifically designed for the Canon C100 camera and is not compatible with any other cameras or alternate set ups. The C100 Z-Finder is designed for use with the standard battery included with the Canon C100 camera. (Canon - BP-955 Lithium-Ion Battery Pack-5200mAh) There may not be clearance for larger batteries. This Z-Finder is not compatible with the C100 Mark II. The C100 Z-Finder Includes: Z-Finder Pro eyepiece/loupe with 1.8x magnification and diopter C100 Z-Finder Mount C100 Z-Finder Z-Bands Three (3) Extender Frames Lanyard and Lanyard Hook Lens Cap, Sun Mask, and protective boot Z-Finder Dust Cover One installed and one additional Anti-Fog disc. This also acts as a lens protector and is expendable. WARNING The Z-finder is a magnifier and as such will magnify the sun and could damage the LCD screen if the sun is allowed to shine directly through the Z-finder lens. This is not a defect but a physical property. Caution should be taken to avoid direct sun light. Proper use of the included lens cap and sun mask will dramatically reduce but not eliminate risk.