Canon Flash Battery Pack SF-17 for Canon 550EX 540EZ (Black)

• An external power source for a higher flash capacity.
• The high performance power pack is a light, compact external power source, used for all Canon flashes.
• A must for event photography such as weddings, and for high frame rate Canon cameras.
• Can reduce the Recycling Time to less than half of the original, while at the same time it can provide double service time (A).
• Suitable for continuous flashing (B).
• Power: 6 AA batteries (Not included).

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