ĐÁNH GIÁ SIGMA 70 200 F2.8

Sigma"s long-awaited S-class 70-200mm f/2.8 is here... but just how good is the lachạy thử lens in the high-performance Sports family?

ByMatthew Richards23 December 2018


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Our Verdict

Sigma’s new 70-200mm Sport is a top-performance lens with sumptuous build quality và a mighty range of up-market, customisable features. It’s a little bigger & heavier than most competing lenses but handling is excellent nonetheless, and it’s remarkably good value at the price.

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Rightly or wrongly, Sigma and Tamron 70-200mm f/2.8 lenses have sầu long been seen as the poor-man’s alternative own-brand editions from Canon và Nikon. 


That all changed a couple of years ago, with the advent of the Tamron G2 (Generation 2) edition, which goes toe lớn toe with the Camera manufacturers’ pro-grade zooms, while still massively undercutting them for cost. 

The long-awaited Sport edition of Sigma’s lens has now joined the fray, finally replacing the 2010 model, và delivering a wealth of upgrades và improvements inkhổng lồ the bargain.

A criticism of the old Sigma lens, the Sigma 70-200mm f/2.8 EX DG OS HSM, was that it lacked weather-seals. 

The Thể Thao edition, the Sigma 70-200mm f/2.8 DG OS HSM Sports, is massively better engineered to suit the rigors of a tough professional lifestyle. 


It has a magnesium alloy barrel and a coated brass mounting plate, along with comprehensive weather-seals & water- oil-repellent coatings on the front & rear elements. The look và feel of the lens is also consummately professional, with smooth và precise control rings for zoom and focusing, & three Focus Hold buttons positioned between them, spaced around the circumference of the barrel.



Towards the rear, there’s a smorgasbord of switches, enabling the selection of two autofocus modes with priority given khổng lồ either automatic or manual-override focusing, as well as fully manual focusing. Next up, there’s an autofocus range limiter switch that, by mặc định, cuts out the short range from 1.2m to 3m. 

Next is a dual-mode optical stabilization switch, for static or panning operation, the latter working in landscape, portrait và even diagonal shooting orientations. The Sigma lacks the exposure-only stabilization mode of the Nikon and Tamron lenses, which doesn’t interfere with the viewfinder image and makes it easier lớn trachồng erratically moving objects. 


However, there’s help at hand from the final switch on the barrel, which enables the selection of two separate banks of custom settings.



As with other Sigma ‘Global Vision’ lenses, this one is compatible with Sigma’s optional USB Doông chồng, for applying firmware updates & customization. In this case, customisable options include the ability khổng lồ fine-tune autofocus accuracy through a range of four different zoom settings, each through a progression of four distances from the closest focus position lớn infinity. 

Next, you can select the sensitivity for engaging full-time manual override when the focus ring is twisted. Autofocus speed itself can be switched to lớn fast, standard or ‘smooth’ speeds, & you can change the distance at which the autofocus limiter operates.

 And getting baông chồng lớn stabilization, you can change the standard setting for either Dynamic View mode, which makes the effect of stabilization more clearly visible in the viewfinder, or Moderate View mode, which lessens it. We’d also expected to be able khổng lồ customize the Focus Hold buttons, for example so that they initiated autofocus instead, but the button setting was greyed out in the Optimization Pro software.

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Just behind the ngân hàng of switches, there’s a tripod mounting collar. This operates smoothly with click-stops at 90-degree intervals, và an Arca-Swiss compatible foot is secured lớn it with four allen screws. An allen key for removing the foot is supplied with the lens, along with two spare allen screws. 

However, the mounting ring itself is not removeable và its stub protrudes by about 12milimet (half an inch) from the circumference of the barrel, even when the foot is removed. The lens itself is one of the biggest và heaviest in its class, being 94.2milimet in diameter with an oversized 82mm filter thread, rather than the more usual 77milimet. Weighing in at 1,805g, it’s around 300g heavier than most current competitors.

Performance

Autofocus is as fast, accurate & quiet as you’d hope for in the lachạy thử, top-notch 70-200mm f/2.8 lenses. The optical stabilizer gave an effectiveness of up to lớn four stops in our tests, matching the performance of the lakiểm tra equivalent Nikon lens, beating the newest Mk III Canon, but falling slightly behind the Tamron G2 for static subjects. However, the effectiveness of panning stabilization was a little better than in the Tamron lens.

Image unique is simply fabulous, thanks partly to the inclusion of no less than nine top-grade FLD (Fluorite Low Dispersion) elements and an SLD (Special Low Dispersion) element in the optical path. Sharpness & contrast are excellent, even when shooting wide-open, throughout the entire zoom range. Meanwhile, chromatic aberrations và distortions are negligible, and there’s very good resistance khổng lồ ghosting và flare. 

Defocused areas within images look beautifully smooth and creamy. And the chất lượng of bokeh holds up well when stopping down a little, helped by an extremely well-rounded aperture based on 11 diaphragm blades. 

The diaphragm is electromagnetically controlled in the Nikon- as well as Canon-fit edition of the lens, helping khổng lồ enable consistently accurate exposures even in rapid continuous drive modes. The Canon-fit version also benefits from compatibility with a full set of in-camera corrections for lens aberrations lượt thích lateral chromatic aberrations, distortion & peripheral illumination, not that you’re likely to lớn need them.

Lab tests

Centre sharpness:



Distortion is displayed on a scale of negative values (barrel distortion) through zero (zero distortion) and positive sầu values (pincushion distortion). Barrel distortion at 70mm is barely noticeable, transitioning quickly into lớn negligible pincushion distortion from 100mm upwards. These results are recorded with in-camera and raw-processing distortion correction disabled.

Specifications

Full-frame compatible: YesImage stabilizer: YesMinimum focus distance: 1.2mMax magnification factor: 0.21xManual focus override: Full-timeFocus limit switches: YesInternal zoom: YesInternal focus YesFilter size: 82mmIris blades: 11Weather seals: YesSupplied accessories: Hood, tripod foot, soft caseDimensions: 94x203mmWeight: 1,805g

Verdict

Features: 5/5 Build và handling: 5/5Image quality: 5/5Value: 5/5Overall: 5/5Sigma’s new 70-200milimet Thể Thao is a top-performance lens with sumptuous build chất lượng & a mighty range of up-market, customisable features. It’s a little bigger and heavier than most competing lenses but handling is excellent nonetheless, and it’s remarkably good value at the price.