![]() You'd only use the pop-up flash in Wireless mode if you had a Yongnuo "EX" speedlight in "Sc" slave mode (i.e., Canon wireless eTTL slave). Make sure the pop-up flash is OUT of "Wireless" mode-that gives multiple pre-flashes (kinda like Morse code) to signal the full hotshoe communication. Use S2 on the YN-560IV if the pop-up flash is in eTTL. Use S1 on the YN-560IV if the pop-up flash is in M. If you're trying to trigger the flash off-camera with the 70D's pop-up flash, what mode the camera is in doesn't so much matter as what mode the camera's pop-up flash is in. Terry's post is spot on with the wireless optical slave modes. If you wanted something more similar to a 430EXII/580EXII on the hotshoe, I'd recommend returning the 560 and looking at the Yongnuo 500EX, 565EX or 568EX models (or better yet, a used 430EX or 580EX). since, like the YN-560III, the IV is also a manual-only flash and only has the sync pin. Obviously, you won't have menu control, TTL, HSS, etc. S1/S2 tells the flash to stop "listening" to its foot and to listen to the sensor panel instead. The YN-560IV should work like the YN-560III on the hotshoe-make sure that the flash is out of any slave modes, though, when you mount it onto the camera. Sorry I couldn’t be more help but please do post back if you don’t have any luck. You would be looking to access the menu item “External Flash func. To find where the menu items on the camera are located refer to page 195 entitled Setting the Flash. The information can be reviewed if you refer to page 199 of the EOS 70D user manual entitled External Flash Function Settings. So if your camera is set to fire the flash in a TTL metering mode instead of manual, it stands to reason the flash may not respond when the flash is set in manual mode. ![]() Have you tried setting the flash to “manual” or “M” mode through the camera’s menu and disabling the camera’s “wireless” mode? Remember to mount the flash and turn it on before you start setting the camera’s menu so they can communicate together.įrom what I’m getting here the S1/S2 settings on the flash are for use of manual/TTL metering. So it’s entirely possible I’m way off here. ![]() I don’t use any Yongnou stuff but I’ll make a preliminary suggestion Marcel(?) based on what I was able to find of the 560. Manfred posted while I was investigating manuals! ![]()
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