SmallRig 2917 (SR2917) Light Cage for Sony A7R IV A9 II SmallRig Light Cage for Sony A7R IV A9 II 2917 maintains access to the cameras controls and features a variety of mounting options. In addition to one cold shoe mount and multiple 1/4-20 and 3/8-16 threaded holes this formfitting aluminum cage features several ARRI-style mounts for preventing accessories from twisting when mounted on the cage. The cage also incorporates an anti-twist design with an M2.5 screw fixed to the strap hole in addition to the 1/4-20 camera mounting screw so your camera cant move around in the cage. You can attach SmallRig Top Handle 1984 or SmallRig Wooden Side Handle 2093 for hand-held shooting and SmallRig Cable Clamp 3104 to protect the HDMI cable and port. ARRI-style mounts on the top and side are provided to attach SmallRig ARRI Locating Handle 2165 or SmallRig Ball Head Magic Arm 2115. It also comes with a built-in NATO rail on the left of the cage. Besides a screwdriver is built into the bottom of the cage for tightening the camera screws.