Sigma 60-600mm F4.5-6.3 DG OS HSM Sports Review (Lenstip)
Maciej Latałło has just posted a full review of the newly announced Sigma 60-600mm F4.5-6.3 DG OS HSM Sports Lens (pre-order at Amazon/ B&H/ Adorama) at the lenstip.com. He tested this new lens on Canon EOS 5D Mark III, and find it better in many aspects.