The Zacuto EVA1 Z-Finder is specifically designed to suit the shape and size of the monitor included with the Panasonic EVA1 camera. The EVA1 Z-Finder comes with a flip up frame designed to slide onto the EVA1 LCD and lock securely in place. The Zacuto Z-Finder will pop on and off the frame for quick shooting. The red lever at the bottom of the frame allows you to quickly flip the Z-Finder up without removing it from the frame. If a producer/client/director etc. wants to see into the viewfinder, you can flip it open instead of having to adjust so they can get their eye to the loupe. You can also pop off the Z-Finder and use the EVA1 LCD as a monitor. 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 our comfy, large eyecup. The EVA1 Z-finder comes with a 40mm diameter Zacuto optical designed lens, anti-fog coated protective covers, and the mounting system designed specifically for the EVA1 LCD. 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 diopter range with the included lens and extender frames is -4.0 to 0.0.