Sigma has announced a new addition to its contemporary range of lenses, the 18 - 200mm f/3.5 - 6.3 DC Macro OS HSM.
The lens is available for Canon, Sony, Nikon and Pentax mounts, and provides a zoom range of 300mm in 35mm equivalent terms, as well as macro. The lens also features an Optical Stabiliser. (Canon and Nikon mounts only).
The diameter for the lens has been reduced by 4.6mm compared to its predecessor, and it is one of the smallest in its class of lenses with more than a 7x zoom ratio, and is more comparable in size to a generic standard zoom lens.
One of the biggest features of this lens is that it is possible to shoot subjects as close as Macro lenses. This lens features a minimum focusing distance of 39cm and a maximum magnification ratio of 1:3. It offers the versatility for shooting close-ups of fashion accessories, cuisine, flower arrangements and much more without changing the lens. Its working distance is 14.7cm, and it is suitable for shooing images with natural light as it keeps the shadows of camera and lens off of the image. On its lens barrel, it indicates the maximum shooting magnification at each focal length.
This lens has incorporated TSC (Thermally Stable Composite) that has the same level of thermal shrinkage as aluminum and little elasticity, especially in temperature changes. Since thermal shrinkage is low, it has a high affinity to metal parts that contributes to high precision in product manufacturing. It also results in slimmer mechanical parts, such as the zoom ring and scaling.
Flare and ghosting were thoroughly measured and monitored from the lens development stage to establish an optical design which is resistant to strong incidental light such as backlight. The Super Multi-Layer Coating reduces flare and ghosting and provides sharp and high contrast images even in backlit conditions. Attaching the matched petal type hood, which is supplied, will provide extra protection from flare and ghosting.
The 7 blade-rounded diaphragm creates an attractive blur to the out-of-focus areas of the image, and the HSM (Hyper Sonic Motor) delivers high AF speed and extremely quiet performance. With the latest AF algorithm, smoother AF is achieved.
The lens will be available for £349.99. For more information, take a look at the Sigma website