... one or more 550EX Speedlites can be used as wireless slaves along with the MR
-14EX. The controller unit
now has an illuminated full-info LCD panel and its accepts optional hi ... /64 range, full steps
Setting Method: LCD panel on Controller Unit
(illuminated), similar to 550EX Speedlite
Seven on the MR
-14EX (in addition to any in camera), set on flash ...