Hi Matt,I do it differently. Trigger the SB 910 off camera using the on-camera flash in commander mode, manual flash power, trigger the sb 28 using something like this optical unit which plugs into the SB -28http://www.flashzebra.com/products/0272/index.shtmlFlash zebra may have an optical trigger that works with the CLS pre-flash. If that is possible, use CLS to trigger the sd 910. The sb -28 still needs to be set on manual, and its power is set on the flash.Don
Don BoysHope, MI
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