The Z-Finder Jr. is an excellent starter viewfinder that. offers a 2.5x focusable magnification, a 40mm diameter Zacuto optical design lens, a large form fitting eyecup preventing extraneous light leakage, and a field of view perfectly matched to 3" LCD screens. It does not have an anti-fog coated lens. Therefore if you are going in between extreme environments, you will need some type of anti-fog wipe or material.
The Jr. mounts to the camera using our Jr. stainless steel mounting bracket. The mounting bracket must be sandwiched in between your tripod plate and camera. The bracket mounts to the 1/4 20" screw on your tripod and the Jr. is held in place with pressure from the fork of the bracket it sits in. This bracket cannot be quickly released from your camera; you must unscrew your tripod plate from the bottom of your camera to release the bracket. The bracket must be removed when shooting photos because it will interfere with using the cameras photo optical viewfinder. If you need to quickly move between photos and video, you might want to consider one of the Z-Finder Pro models.The Jr. has an adjustable focal point by using the Zacuto Extender Frames(TM) which allow you to semi-permanently stack frames onto the skirt. The Extender Frames(TM) push the Z-Finder Jr. optics further way from the LCD screen until it is in focus for you. The Extender Frames will get the focus close but might not be exact as you can't dial it in with a diopter, as you can with our Pro models The adjustable focal point is a advantage over our competitors who have a fixed focal point viewfinder; thus accommodating everyone. If you have perfect vision, wear contacts or don't mind wearing your glasses while shooting then the Jr. might be a good option for you.The Z-Finder Jr. Mounting Bracket only works with small bodied DSLR cameras such as the Canon 5d/7d. If you would like to use the Z-Finder Jr on a small bodied DSLR with a battery or a taller bodied camera such as the Canon 1D Mark IV, you will need to use the Gorilla Plate as well as the battery grip frame or the taller body frame or the snap fit adhesive frame.The Jr. comes in at $265.00, which is a great price for an adjustable focal point viewfinder with a lifetime warranty; just be sure it works for your needs.