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Amazon.com : Canon 550 EX Flash for G6, G5, G3, G2, G1, Pro1, Pro90 & all EOS SLR Cameras : On Camera Shoe Mount Flashes : Electronics
Amazon.com : Canon 550 EX Flash for G6, G5, G3, G2, G1, Pro1, Pro90 & all EOS SLR Cameras : On Camera Shoe Mount Flashes : Electronics
Amazon.com : Canon Speedlite 550EX - Hot-shoe clip-on flash - 55m : On Camera Shoe Mount Flashes : Electronics