The Z-Finder Jr. is one of Zacuto’s Optical Viewfinders that allows DSLR cameras to have the correct form factor for video. It offers 2.5x focusable magnification, a 40mm diameter Zacuto optical designed lens, an eyecup preventing extraneous light leakage, & a field of view perfectly matched to 3” LCD screens. The Z-Finder Jr. does not have a diopter instead it uses Z-Finder Extender Frames to adjust the focal point. The Z-Finder Jr's focal point is -2.75 & up (unlimited with extender frames). The Z-Finder Extender Frames attach to the skirt of the Z-Finder Jr. & allow you to semi-permanently stack the frames until the LCD screen is in focus for you. The Z-Finder Jr. uses a mounting bracket that must be sandwiched in between a tripod plate & the camera. The bracket mounts to the ¼ 20” screw on your tripod plate & the actual Jr. is held in place with pressure from the fork of the bracket it sits in. You also have the option to mount the Z-Finder Jr. using the Z-Finder Mounting Frame (snap fit adhesive mounting frame) which is also included. Zacuto also added a lanyard hook on the outside of the Z-Finder Jr. so you can attach a Zacuto lanyard to it. This allows for the user to quickly take the Z-finder Jr. off & on when needed. The Z-Finder Jr. Mounting Bracket only works with small bodied DSLR cameras such as the Canon 5d/7d. 2 Extender Frames Z-Finder JR. Mounting Bracket Lanyard & Lanyard Hook Lens Cap Z-Finder Snap Fit Mounting Frame