I'm trying to use godox tt685 as an on-camera and/or off-camera flash. First question, can it be used on camera? When I put it in the hot shoe and shoot, it doesn't fire.
Second, can I use the radio control to trigger the remote flash? I can get it to work with optical, but I want the flash to fire from another room without line of sight to the camera. Is there a a camera setting to do this, or do I have to buy an accessory trigger to use radio mode? The flash has radio trigger option, but the camera doesn't appear to.
thanks!!