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  1. J

    Olympus EC 20 teleconverter

    Hi, I've just joined. I bought the Sigma 70-200mm f/2.8 II EX DG APO Macro HSM AF Lens for Four Thirds System (olympus E-510) mainly for action photography, specificially surfing but the reach is not enough. Unfortunately sigma recommends using only their teleconverters for this lens but don't...
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