This particular lens has a maximum focal length of 200 mm and a minimum focusing distance of 1.2 m. The filter size for this lens is 82 mm, so make sure the filters will fit.
From London Camera Exchange
Sigma 70-200mm F2.8 DG OS HSM Sport - For Canon
TechintheBasket
Sigma 70-200mm f/2.8 DG OS HSM Sports Lens for Canon EF
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