From the outside and with the door closed, ensure that the. frame is in a straight vertical plane (not twisted). To do. this check that the weather-stripping on the latch side is. evenly compressed along the entire height of the door slab.
In Binary Mode, the firearm will discharge one round with every function of the trigger whether a pull or a release. A user can negate the round that would otherwise be fired during the release function by simply moving the selector back to Mode 2 and then safely releasing the trigger.
TTL triggers are triggers that are capable of communicating the hotshoe protocol so that features aside from syncing can be sent from the camera's hotshoe to the remote flash foot. If you look at the flash foot or the camera hotshoe, the pin/contact that's in the center of the square is the sync signal. That's the signal that tells the flash when to fire so that it's in sync with the camera shutters and that the light from the flash will be used for the exposure.