Surprisingly, the Sigma 24-70mm f/2.8 DG OS HSM Art and 14mm f/1.8 DG HSM Art lenses are scheduled to start shipping tomorrow, the day immediately following the acceptance of preorders (source: B&H).
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Sigma 24-70mm f/2.8 DG OS HSM Art – B&H | Adorama
Sigma 14mm f/1.8 DG HSM Art – B&H | Adorama