Of course as one of Sigma's flagship lenses, the 70-200mm F2.8 boasts a suitably complex optical design, featuring 18 elements in 15 groups, two of which are Extraordinary Low Dispersion (ELD) glass and two Special Low Dispersion (SLD) glass for correction of chromatic aberrations.
Other attractions include internal focusing and zooming mechanisms, and a quick-release tripod mount collar which can be removed from the lens in seconds.
On paper at least, this is a lens which might interest a huge number of photographers across a range of abilities; so is it worthy of that interest?
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