Sigma AF 70-200mm f/2.8 EX OS HSM (FX) - Review / Test ...

Sigma AF 70-200mm f/2.8 EX OS HSM (FX) Review. ... when Sigma introduced the EX 70-200/2.8 APO as one of the first lenses to carry ... The lens is compatible and offers full AF functionality with both current Sigma APO DG tele converters.

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