70D remote trigger

[Prenno147]

Hi all,
I am new to this forum but have had canons for some time and just beginning to developed my skills in the use of off camera flashes etc.
I have purchased a budget set of portable flash units and using the built in flash as a trigger the external units do flash as expected. However, the external flash is not in sync with the actual shot. If I take a picture looking directly at the flash unit, I can see that it is triggered but it does not show in the taken image.
Has anyone experienced this?? Please help and thanks in advance.

Chris

[OlinOvid]

Hi...I've used the RC-6 for years - since 2010, in fact - and it's not needed a new battery yet. I've clipped it to the neck strap of each successive body it has been used with, and since it's so light I've always had it to hand. Why bother with anything else?

surface mount assembly