Buy from Amazon.com : http://fave.co/1MGsMv9 <br /><br />Canon MT-24EX Macro Twin Lite Flash for Canon Digital SLR Cameras<br /><br />Product Description : <br />When used with Speedlite 550EX units wireless control of up to three slave groups is possible with first or second curtain synchronization <br />Mounting ring can be attached directly to the front of the macro lens <br />Forward tilting control unit will not hit flash even when mounting ring is rotated to full 50 extent <br />Large easily read LCD panel
