Twin flash arm system for Canon MT-24EX

thingiverse

This mounting system attaches twin flash heads of the Canon MT-24EX macro flash to your lens' tripod collar using 1/2" Loc-Line tubing, forming the arms that connect them.\r\n\r\nThis allows a connection that is rigid enough to stay exactly where you put it but also easy to adjust to position your flash precisely where you need it.\r\n\r\nOne of the main goals of this design is to limit the degrees of freedom of the system. I got fed up with third-party flash arms that would twist and loosen on their mount at the worst possible moment, allowing the flash heads to spin on their ballhead mounts too.\r\n\r\nThis design uses anti-twist mounts on both the lens and flash ends of the connection, so that only the arms themselves and the adjustment built-in to the MT-24EX can move. It's perfect!\r\n\r\nI've designed an anti-twist mount for the Sigma TS-21 lens collar.\r\n\r\nThat Sigma collar is found on the following Sigma lenses: APO 70-200 / 2.8 EX DG OS HSM, APO 70-200 / 2.8 EX DG MACRO HSM, APO 70-200 / 2.8 II EX DG MACRO HSM, APO 50-150 / 2.8 EX DC OS HSM, APO 100-300 / 4 EX DG HSM, APO 300 / 2.8 EX DG HSM, MACRO APO 150 / 2.8 EX DG HSM, MACRO APO 150 / 2.8 EX DG OS HSM, MACRO APO 180 / 3.5 EX DG HSM, and MACRO APO 180 / 2.8 EX DG OS HSM.\r\n\r\nI've also designed a mount that fits an aftermarket replacement for the TS-21, the iShoot SM720, which is shown in most of the photos above. Because this collar has more than one screw hole on its foot, a much sturdier and more compact anti-twist design is possible.\r\n\r\nA version of this mount with no anti-twist features could be produced that would fit on any lens foot, but trust me, it's not worth it. Without anti-twist features, the torque produced on the mount screw by adjusting the arms is basically guaranteed to unscrew the whole mount, resulting in you having to retighten the screw over and over again while shooting in the field.\r\n\r\nThe super long extension tube shown in the photos above can be seen here: https://www.thingiverse.com/thing:3761957.\r\n\r\nYou can find my design for MT-24EX diffusers here: https://www.thingiverse.com/thing:3844481