Polariser users should be pleased that the 67mm filter thread doesn't rotate on focus. There are hard stops at both ends of the range, making it easier to set focus at infinity. The Sigma 100-400mm F5-6.3 DG DN OS lens has a large focus ring, and it is ridged for easier grip too. The Sigma 100-400mm F5-6.3 DG DN OS lens features a zoom lock switch that can be locked at the 100mm focal length, which is useful when storing the lens. The OS system has two modes - mode 1 is suitable for general photography, and mode 2 is best for panning shots of moving subjects in a horizontal direction (not vertical). The built-in Vibration Reduction is activated via the OS switch on the lens barrel, which offers around 4 stops of compensation. There is a dedicated Auto Focus Lock (AFL) button that can also be re-configured to assign various functions to the lens barrel. There's no distance scale on this version of the lens. You can also use the USB dock to customise these ranges to your own needs. The focus limiter switch has three settings, FULL, 6m-infinity and 1.12/1.6-6m, which helps speed up the auto-focusing if you know how far your subject is from the lens.
#Sigmaos review manual
Full-time manual focus override is also when set on the camera body. In terms of features, the Sigma 100-400mm F5-6.3 DG DN OS offers everything that you need from a telephoto zoom lens.įocusing is usefully internal and manual focusing is possible when set via the Focus switch on the lens barrel. The optical elements are made of high-grade glass with 4 SLD glass elements to reduce color fringing and chromatic aberrations, while the lens commendably has a dust and splash-proof construction and a brass mount. The Sigma 100-400mm F5-6.3 DG DN OS lens has a plastic shell with a mixture of metallic and plastic parts used inside. Note that the lens extends by quite a long way when zoomed out from 100mm to 400mm.īuild quality is very good. This is a lens that you can comfortably hand-hold for long periods of time. Weighing in at 1140g and measuring 19.92cm in length, the Sigma 100-400mm F5-6.3 DG DN OS is actually quite lightweight and compact given the focal range that it covers.Īs seen in the photos below, it's at home on a small full-frame camera like the Sony A7 III, at least until you zoom to 400mm. The optional TS-111 tripod collar costs an additional £116 / $107. The Sigma 100-400mm F5-6.3 DG DN OS lens is currently available priced at £899 / $949 in the UK and the US, respectively. The lens is protected by water and oil-repellent coating on the front and rear lenses and a dust and splash-proof construction on the mount.
There's also a Hyper Sonic Motor for fast and quiet autofocusing, a zoom lock switch, a focus limiter and a customisable AFL button. The Sigma 100-400mm F5-6.3 DG DN OS features a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas of the image and offers 4 stops of built-in optical image stabilisation. The Sigma 100-400mm F5-6.3 DG DN OS is a compact and lightweight 4x telephoto zoom lens for Sony Alpha E-mount full-frame and APS-C cameras (with an effective increase in focal length to 150-600mm).
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