Reviews and Problems with Sigma APO 80-400mm F4.5-5.6 EX DG OS
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Value for money 7
Overall quality 6
Build quality 7
Sigma AF 80-400mm f/4.5-5.6 EX APO OS - Review / Test Report
15 January 2004
Conclusion: The Sigma AF 80-400mm f/4.5-5.6 EX OS is an impressive piece of equipment. In terms of build quality Sigma seems to have catched up with the genuine brand offerings. Nonetheless the lens didn't convince completely. In the lab the sheer quality figures are surely good enough with slightly better MTF results than the Canon EF 100-400mm f/4.5-5.6 USM L IS but in the field the OS didn't really feel as reassuring or mature (or I had too much coffee at the time ...).