<p>Hi there,<br />I own a set of Yongnuo RF602 and YN 560 flashes.<br />I understand that i cant use high speed sync with this kit.<br />My question is if i purchase a set of YN622 trigger, receivers will i be able to use high speed sync with my flashes or do i need to buy new flashes compatible for high speed sync such as the YN-568EX<br />Thanks for the help.</p>