Operationally, the lens is generally pleasant to use. It’s also noticeably heavier, suggesting Sigma has used a lot of glass in its construction. It does have a larger-diameter front element, which results in a sizeable 82mm filter thread. In terms of size, the Sigma zoom is very similar indeed to those two lenses. However, it’s not described as weather-sealed, which is a disadvantage compared with its closest equivalents, the Canon EF 24-105mm f/4L IS USM and the Nikon AF-S Nikkor 24-120mm f/4G ED VR. It has a solid, weighty feel to it and a high standard of fit and finish. Sigma 24-105mm f/4 DG OS HSM|A review: Build and handlingĪs part of Sigma’s high-end Art range, the 24-105mm is an impressively well-made lens. There’s no K-mount version yet, but with Pentax not currently offering a full-frame model, that’s less of a disappointment than it might have been. Sigma tends to make its lenses available in a wide variety of mounts, and accordingly this 24-105mm optic is available to fit Canon, Nikon, Sigma and Sony cameras (the last of these lacks image stabilisation). A nine-bladed circular diaphragm is designed to give smoothly blurred backgrounds, and the lens can focus to a minimum distance of 45cm. A large switch on the side of the barrel engages manual focus, and a second smaller switch controls the optical image stabilisation. Sigma’s Super Multi-Layer Coating is also included to minimise flare and ghosting.Īutofocusing is handled by an ultrasonic-type Hyper Sonic Motor, which is fast and very quiet. It employs a complex optical formula of 19 elements in 14 groups, including an array of special elements to suppress aberrations. The Sigma lens offers a very useful zoom range that encompasses everything from a landscape-friendly wideangle to a short telephoto for portraits.
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