Reviews and Problems with Sigma AF 70-300mm f4-5.6 DL Macro
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Value for money 6
Overall quality 3
Build quality 4
Sigma AF 70-300mm f/4-5.6 DG OS (FX) - Review / Test Report
8 February 2009
Conclusion: The Sigma AF 70-300mm f/4-5.6 OS is an attractive lens on paper, less so in the field, though. Sharpness is good to very good at the shorter end, but drops considerably twowards the longer focal lengths, especially at the borders and corners, which are outright poor at 300 mm.