Part of the Sigmas Contemporary line, this Sigma 100-400mm f/5 - 6.3 DG DN OS Contemporary Lens is a versatile zoom designed for Leica L-mount full-frame mirrorless systems to achieve a balance between impressive optical performance and convenience. As a telephoto zoom with a 100-400mm focal length range, it can also be used with APS-C models where it provides a 150-600mm equivalent focal length range. Its impressive reach is paired with a relatively compact design to support handheld shooting when desired. For improved clarity and accurate colour, the 22-elements-in-16-groups optical design includes one F Low Dispersion (FLD) element and four Special Low Dispersion (SLD) elements to notably reduce chromatic abberations and colour fringing. In addition, integrated Optical Image Stabilisation compensates for up to four stops of camera shake to help achieve sharper handheld shooting. For steady shooting atop a tripod or monopod, an optional TS-111 Tripod Socket is separately available.
The optical attributes are complemented by a stepping AF motor which achieves quick, quiet, and accurate autofocus performance; additionally, an optimised AF algorithm aids in producing a smoother focusing. At the 100mm end of the zoom range, a minimum focusing distance of 1.1m is available for shooting closer up. A built-in programmable AF-L button is available for adjusting various shooting settings whilst the dedicated AF/MF switch enables a quick switch between the focus types. A zoom lock switch is also integrated for preventing the barrel from being accidentally extended when not in use. The mount is rubber sealed to render it dust-and splash-resistant for operation in inclement weather, and mounting accuracy as well as rigidity are improved thanks to the brass construction of the bayonet. A rounded 9-blade diaphragm contributes to a pleasing boken quality. This versatile lens comes with front and rear lens caps, a lens hood and a protective cover.
