Canon MT-24EX Macro Twin Lite Flash for Canon Digital SLR Cameras International Version (No warranty)

$819.49 (as of December 4, 2016, 4:11 am)

When used with Speedlite 550EX units, wireless control of up to three slave groups is possible, with first or second curtain synchronization
Mounting ring can be attached directly to the front of the macro lens
Forward tilting control unit will not hit flash, even when mounting ring is rotated to full 50? extent

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