Fotga DP500III 4x4 DSLR Swing-Away Matte Box w/Donuts for 15mm Rail Rod System for Sony A7 A7R A7S II III A9 A6300 A6500 GH5/5S Canon 5D 6D 7D II III IV D850 BMPCC 4K 6K DSLR Video Cinema Camera