Sigma AF 105mm f/2.8 EX DG macro - Review / Lab Test Report
26 February 2008
Conclusion: The Sigma AF 105mm f/2.8 EX DG macro is an excellent lens without any significant flaw. It's optically as good as the Canon EF 100mm f/2.8 USM macro. The lens has a very good build quality though not quite as nice as the Canon due to its focus extension system and the conventional AF drive.