Neewer Remote Control Switch Release Replacement for Canon EOS 650D/600D/550D/500D/1000D/450D/400D/350D/300D/100D/700D Plug and Use Help Preventing vibration during long exposures, close up or continuous shooting Perfect to use during taking time-lapse photography and long time exposure Two stages release button: Halfway pressed button - For auto-focus and exposure metering. Shutter release button lock - For long exposures shooting and continuous shooting Compatibility: Canon EOS 650D/600D/550D/500D/1000D/450D/400D/350D/300D/100D/700D (Rebel T4i,Rebel, Rebel XT, Rebel XTi, Rebel XSi, Rebel XS, Rebel T1i, Rebel T2i, Rebel T3i) Canon EOS 60D Samsung GX-20/GX-10/GX-1L GX-1S Pentax K20D/K200D/K10D/K100D Super/K100D/K110D/ *ist Ds2 / *ist D / *ist Ds / *ist / *ist DL