![]() ![]() The lens is also available in Canon and Sigma mounts. Using an internal motor means it is suitable for all Nikon DSLR models. We tested a Nikon-mount version of the Sigma 150mm f/2.8. Focusing is internal and uses a Hyper Sonic Motor (HSM) for fast and quiet operation. The maximum aperture is f/2.8 with a minimum of f/22, although the effective aperture varies according to the focal distance, reducing the aperture by as much as 2 stops at the maximum 1:1 magnification to give an f/5.6-f/45 range. The front element has a regular 72mm filter thread. ![]() Internally, the lens is constructed of 19 elements in 13 groups, three of which are Special Low Dispersion (SLD) elements, while both front and rear elements feature a Super-Multi Layer coating to reduce flare and ghosting. The lens is specified by Sigma as DG rather than DC, which means that, although it is optimised for digital cameras, it is not limited to purely APS-C-sized sensors and is suitable for full-frame models. Optical stabilisation comes with two settings for full stabilisation (mode 1) or vertical-only stabilisation (mode 2) to allow for panning and claims a 4EV benefit. Autofocus can be limited to above or below 53cm on a side switch, while a manual override is always available in autofocus. The focus window sits behind the focus ring and gives measurements in feet, metres and magnification ratio, which is useful for technical work. Just a half turn takes the lens from minimum focus to infinity, which sounds quite short but this feels the right balance between accuracy and speed. This is important here, as the lens will often be used with manual focus. The focus ring sits at the front of the lens and is nice and wide, with a smooth action and plenty of resistance to ensure accurate adjustment. The finish is a smooth matt black, which gives the lens a premium feel that is finished off with the signature gold ring around the end of the barrel. This is due in part to the removable mount collar, which allows a more even balance point for tripod use, and the lens is lengthened further by the substantial full-sized lens hood. Features and buildĪlthough only 45mm longer than the popular 105mm macro (which has also been updated in recent years), the 150mm is much larger. However, with the original version of the 150mm macro often selling for less than £600, the initial selling price of £999.99 for the latest version may seem a little steep. ![]() This update is one of several that have been implemented to the range to add stabilisation and the latest glass coatings, both of which should improve the overall performance of the lens. It is the longest of the four true macro lenses in the Sigma range, comprising a 50mm, 70mm and 105mm, all with f/2.8 apertures. Sigma’s 150mm macro lens was first released in 2004. A longer macro focal length, such as the 150mm, is preferred by nature photographers as it allows them to keep some distance from their subject. When you use shorter lenses, the subject can become shaded by the lens barrel and potentially be scared away if it is an animal. Macro lenses come in various focal lengths, usually from 50mm upwards, but the focal length is important because, the shorter it is, the closer the subject must be to reach full 1:1 magnification. Of course, for such a lens to be considered a true macro, it must reproduce its subject at life size (1:1) on the sensor, regardless of the sensor size. Macro lenses perform the seemingly simple task of close focusing, allowing the photographer to obtain fine detail shots of the smallest subjects. ![]()
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