Auto Extension Rings "3-piece 31mm, 21mm & 13mm" for macro photography to fit Canon EF / EF-S EOS 1100D, 1000D 700D, 650D, 600D, 550D, 500D, 450D, 400D, 350D, 300D, 100D, 50D, 40D , 30D, 20D, 10D, 7D, 6D, 5D series, 1V series, 1D series and much more (electronic)
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