Sigma 10-20 mm f/4-5.6 EX DC HSM
1. Introduction
In February 2005 Sigma announced the launch of a new ultra wideangle lens designed to work on reflex cameras with small APS-C/DX sensors. The focal lengths of the lens were supposed to range from 10 to 20 mm and the maximum relative aperture to change from 4.0 to 5.6. Additionally, the lens was to belong to the high-end Sigma class, marked with the EX symbol and equipped with an HSM motor, ensuring silent, quick and efficient autofocus work.
The most important thing, though, was the fact that the Sigma 10-20 mm was supposed to cost significantly less than other rival instruments available on the market: the Canon EF-S 10-22 mm f/3.5-4.5 USM and the Nikkor AF-S 12-24 mm f/4G DX IF-ED.
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The interest in that lens became even more aroused when it snapped up the TIPA 2006 award. Does it really deserve so much praise? You will find out reading the next chapters.
The lens was lent for testing purposes by the K-Consult company.
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