The Yongnuo YN-24EX TTL Macro Flash is a dual flash head design that provides excellent control over the position of the light and how it will hit the subject. It has a guide number of 85′ at ISO 100 for a single head or 79′ at ISO 100 when both flash heads are in use. Manual control is available from 1/1 to 1/128 power in 1/3-stop increments. An LED autofocus assist light and 1st and 2nd curtain sync are available.
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