Canon 5D3 with 600EX TTL pass through failing every so often
Shot a wedding tonight with the Cactus V6 (newest firmware) between my 5D3 and 600EX. The V6 is set for TTL pass and set to Canon 600EX.. The ETTL works like normal most of the time BUT, every so often, the 600EX (which is in ETTL mode) starts firing FULL POWER until I turn the Cactus V6 off and then turn it back on. Its like the TTL pass thought fails and only send a full power fire commend. Over 7 hours it did it about 8 times and ruined a few of my shots..