The gear ring belt is designed for HDSLR follow focus use such as Canon 60D 600D 5D2 /EOS 550D/Rebel T2i/Kiss X4,specially for Canon EOS DSLR users. it is for EOS movie film makers.
It works even with Canon 50mm F1.8 IS Lens ( Not flat focus ring.)
It is compatible with all DSLR cameras, video cameras, HDV,DV, specially for HDSLR camera with movie function.
