|Introduction | Sigma 17-70mm F2.8-4 DC Macro HSM C on Sony SLT Alpha 77: Good all round performance | Sigma 17-70mm F2.8-4 DC Macro HSM C on Pentax K3: Slightly higher sharpness over the Sony combination | Sigma 17-70mm F2.8-4 DC Macro HSM C vs Sigma 17-50mm F2.8 EX DC OS HSM on A77: Slight improvement in the outer field wide-open at 17mm | Sigma 17-70mm F2.8-4 DC Macro HSM C vs Sigma 17-50mm F2.8 EX DC OS HSM on Pentax K3: Closely matched at the 17mm at wide apertures | Conclusion|
Designed as a fast ‘standard’ zoom, the Sigma 17-70mm f2.8-4 DC Macro HSM C is the first model in the firm’s ‘Contemporary’ series. Featuring a revamped exterior and modified optical construction, the lens is intended as a premium alternative to the official starter lenses found in camera ‘kits’. Read on to see how well it performs.
Although the ‘starter’ type lenses found in camera kits are generally good-performers, Sigma’s hoping potential purchasers will either be tempted when ordering their new camera body or maybe even replace their existing 18-55mm kit lens with this faster (brighter) model.
Although this recently upgraded zoom shares a similar cosmetic appearance to the firm’s Art-series this new model is the first of the new general-purpose Contemporary line. As well as a revised exterior, it features a modified optical construction consisting of 16 elements arranged in 14 groups. Like its predecessor it has has a sonic-type AF motor and focuses to a minimum distance of 8.67” (22cm) and a maximum magnification of 1:2.8. However, with a 72mm filter thread and 3.1” (79mm) maximum diameter and an overall length of 3.2” (82mm) it’s smaller and lighter (at 16.04 oz / 465g) than the lens it replaces. It’s available now, with a $30 premium over the model it replaces, at $499.