i am shooting manual with the flash on manual
it works with my 5D (canon) and one of my canon 1dsmk11's
but the second 1dsmk11 fired the strobe only like halfway - no picture is taken and the battery goes dead
..if i yank the battery and put it back in i notice the battery is not dead - but if i take another shot with the strobe - same thing
- a sort of preflash/half flash - and a dead camera battery (the camera firmware is up to date)
..canons speedlite works fine on the same shoemount and my other cameras work fine with the strobe connected to the same seacam housing seacam housing
i have no idea what this could be????