Sigma 100-400mm f/5-6.Three DG OS HSM | C evaluate

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Sigma markets two 150-600mm super-telephoto zooms in its World Imaginative and prescient line-up. The ‘Sport’ lens goes for all-out efficiency, whereas the ‘Contemporary’ version goals to scale back the dimensions and weight, with minimal impression on picture high quality. Even so, they’re each large, heavy lenses that weigh in at nearly 3kg and 2kg respectively. As such, they’re heavy to hold round and really feel even heavier whenever you get into prolonged durations of handheld taking pictures. 

By stark distinction, Sigma’s newer 100-400mm Up to date zoom is barely greater than a kilogram, and actually takes a load off.

Options

  • Options 4 SLD (Particular Low Dispersion) parts
  • Ring-type ultrasonic autofocus system
  • New-generation optical stabilizer

As a direct competitor to Tamron’s lately launched 100-400mm lens, the Sigma may be very related in dimension, weight and aperture score. Nevertheless, regardless of being solely marginally heavier, the Sigma has a extra complicated optical path, based mostly on 21 quite than 17 parts. Of those, 4 are SLD (Particular Low Dispersion) parts, aiming to maximise distinction and sharpness whereas minimizing color fringing.

Specification

Focal size: 100-400mm

Mount: Canon, Nikon, Sigma

Filter dimension: 67mm

Max aperture: f/5-6.3

Most magnification: 0.26x

Dimensions: 86 x 182mm

Weight: 1,160g

Excessive-performance options embrace a ring-type ultrasonic autofocus system with revamped algorithms to extend operational velocity. Three switchable focus modes embrace handbook focusing and each auto-priority and manual-priority autofocus modes.  Within the latter, you may manually override autofocus with out having to attend for it to lock onto a topic, in addition to utilizing handbook override in steady or ‘AI Servo’ autofocus mode. A 3-position autofocus vary limiter swap lets you lock the vary both aspect of six metres. 

There’s a new-generation optical stabilizer that senses and corrects for motion in horizontal, vertical and diagonal planes. As standard for World Imaginative and prescient lenses, Sigma’s optionally available USB Dock (£39 / $59) allows efficiency tweaks and firmware updates. On this case, you may arrange two switchable ‘custom’ modes with totally different autofocus speeds and vary limiter distances, in addition to assigning various stabilization behaviours, for instance making the impact of stabilization kind of noticeable within the viewfinder. The USB Dock additionally lets you fine-tune autofocus distance accuracy.

Construct high quality and dealing with

  • Stable and sturdy development
  • There’s no tripod mount collar obtainable
  • Dealing with is assured with a smooth-action

Construct high quality feels good all through, with a stable and sturdy development. A weather-seal is fitted to the mounting plate however there are not any different weather-seals within the lens. It’s much like the Sigma 150-600mm|C lens on this respect. 

There’s no tripod mount collar obtainable for the lens, whereas Tamron sells one as an albeit costly optionally available additional. Sigma’s stance is comprehensible, because the lens is marketed on its suitability for handheld taking pictures. Even so, stability is poor when utilizing a tripod or monopod, particularly in portrait orientation taking pictures, so it might be good to have the selection of an optionally available ring.

An fascinating bonus is that, in addition to the common twist-action zoom ring, the lens can also be engineered for push-pull zooming

General, dealing with is assured with smooth-action zoom and focus rings, and helpful autofocus and stabilizer modes obtainable by way of good-quality switches. An fascinating bonus is that, in addition to the common twist-action zoom ring, the lens can also be engineered for push-pull zooming. Certainly, the equipped lens hood is specifically formed to allow a snug grip for this objective. The draw back is that zoom creep will be problematic and, in contrast to in each of Sigma’s 150-600mm lenses, the zoom lock solely works on the lens’s shortest focal size. Within the bigger lenses, you may lock the zoom ring at any marked zoom distance, for instance 150mm, 180mm, 200mm, 250mm and so forth.

Efficiency

  • Optical stabilization is price about 4 f/stops
  • Lens aperture is electromagnetically managed
  • Picture high quality is excellent on the entire

The autofocus system may be very fast persistently correct. The manual-priority override choice works significantly nicely, as does the same M/A choice in some Nikon lenses. Optical stabilization is price about 4 f/stops in static mode and rather less in panning mode.

Like many new Sigma and Tamron lenses, the diaphragm for controlling the lens aperture is electromagnetically managed. This has at all times been the case for Canon EF appropriate lenses, however Nikon has traditionally used a mechanical lever for altering the aperture. Electromagnetic management allows higher accuracy and consistency in fast steady drive mode however, in some older Nikon DSLRs, you may solely use these lenses at their widest aperture setting. The identical is true of Nikon’s personal ‘E’ sort lenses.

Picture high quality is excellent on the entire, with spectacular distinction even when taking pictures wide-open. Centre-sharpness is fairly truthful however not as as spectacular as from the competing Tamron 100-400mm lens, at any focal size or aperture setting. Nevertheless, sharpness from the Sigma lens is extra constant throughout the entire picture body, with much less of a drop-off in direction of the corners. Color fringing and pincushion distortion are each pretty minimal, and there’s good resistance to ghosting and flare.

Verdict

When a manageable dimension and weight are extra vital than outright telephoto attain, the Sigma 100-400mm presents compromise between price range 70-300mm lenses and whopping super-telephoto zooms. It’s well-built, handles properly and boasts some helpful up-market options, like dual-mode auto-priority and manual-priority autofocus modes, together with two customisable setups which can be simply obtainable from a swap on the lens barrel. Nevertheless, you’ll want to purchase Sigma’s optionally available USB Dock to initially arrange the ‘Custom’ modes.

The Sigma is cheaper to purchase than the competing Tamron lens and performs each bit as nicely in most respects, with a greater diploma of customisation. Nevertheless, the Tamron steals a lead for sharpness within the central area of the body, and has a extra complete set of weather-seals. In the end, it’s a troublesome selection between the 2 lenses however there’s no denying that the Sigma combines good efficiency and superior options at a discount value.



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