High-Speed Sync/Focal Plane Flash. High-Speed Sync/Focal Plane Flash is a useful mode when the photographer needs to use a shutter speed beyond the maximum flash-sync speed on the camera, usually 1/250sec. Setting the flash to this mode allows the photographer to use any shutter speed desired, even 1/8000sec. Pressing the button activates an electronic release latch so the spring-loaded flash can pop-up. If there's no battery in the camera, then there's no power for that electronic latch. If the battery is in and the camera is powered on and you press the release button then the flash SHOULD pop up. Go to Camera Setting 1 (the camera with the 1 next to it), go across to page 11/14 (“Flash”) and find the option called Exp.comp.set. Ensure this is set to Ambient Only. 5. Turn Off Anti-Flicker Mode. I realise this sounds strange and impractical for the topic, but there is a method to the madness with this one. The radio triggers are pricey (vs cords) but not as expensive as some. In my research the YN622C transceiver was the best and cheapest option to go off camera flash using a radio trigger. Photos by MJ's gear list: Canon EOS 60D Canon EOS 1100D Canon EOS 7D Mark II Canon EF 50mm F1.8 II Canon EF 85mm F1.8 USM +9 more. One solution is to turn off any special camera features like flash and stabilization. Switch the camera dial settings to an option other than the automatic settings and take a picture. After, open the battery case to turn off the camera. The shock of the camera turning off unexpectedly may cause the mirror to jump back into place. .

canon camera flash not working