There is a small switch in the hot shoe; looking at the back of the 60D it is on the right side. That switch occasionally gets stuck making the camera think an external flash is mounted. Usually just moving the switch around frees it up. I also suggest you check the pages around 180 in the English manual. 3. The "flash busy" message is shown when the flash is charging and not yet ready to be used. The flash works by slowly charging a capacitor from the batteries and then discharging all that power in a very short time. If your batteries are low on power or you have low quality batteries it will take longer to charge the flash and so you'll see a I just bought a starter kit of Godox with 3 studio lamps/flashes (including white box/umbrella stuff). And they come with a flash trigger (model Godox RT-16). The synchronization between the camera - flash trigger - and the 3 flashes seems to work, because when I take a picture (having the transmitter in the hot shoe), the three flashes flash. If the camera or triggers are capable (I don't think they are) of being set to 'TTL' mode (not E-TTL, not E-TTL II modes) the 380EX will not fire a pre-flash. The preflash will also not fire when the 380EX is used with a pre-1995 "Type B" EOS film cameras with the flash attached to the hotshoe. All Canon digital SLRs are either Type A (E-TTL Canon EOS R5 Canon EF 20mm f/2.8 USM Canon EF 50mm F1.4 USM Canon EF 50mm F1.8 II Canon EF 17-40mm f/4.0L USM +7 more Reply Reply with quote Reply to thread Complain Canon Speedlite 430EX III-RT Flash. If you’re in the market for a professional-grade flash, one of the best is the Canon Speedlite 430EX III-R. Although it commands a premium price, Canon photographers are rewarded with a quality flash for versatile shooting in just about any environment. Setting up your controls and taking the perfect shot The camera and flash will communicate using coded light pulses. It is possible to set the camera flash so that it contributes almost no light to the scene but there will still be a visible flash in order to trigger the slave flash. Here is a basic video that describes the basic steps to get the Canon wireless system working for you: Yongnuo Notice the Lightning bolt on the top switch over the FUNC / SET button. With the camera turned on to take a photo (not the review mode) pressing that switch should cycle through 3 options (based on the cameras I've owned) Flash on, Flash off, or Auto. When it says Flash on press the SET button. pu8WGn.