Sigma 85 Mm F14 Dg Hsm Art E Mount

With no fewer than 14 elements arranged in 12 groups and a minimum focus distance of 33.46 in. (85cm), this new lens adopts a circuitous optical construction. To help reduce chromatic and spherical aberrations, two of those 14 elements are depression-dispersion SLD glass types, while a third is an aspherical-shaped lens.

The new model features improved environmental protection over earlier lenses in the lineup. In addition to oleophobic coatings on the forepart and rear lenses, the lens mount features rubber sealing for protection against grit and moisture, though it's not sure that the lens has further sealing elsewhere.

As an HSM model, this new lens has a sonic-type AF motor with full-time manual focus override in both single and continuous AF modes, which volition garner additional favor among hard-core dorsum-button AF users. Fortunately Sigma has adopted a newly-developed motor with one.3x the torque of its predecessor to handle this big lens.

Priced effectually $1199, this new lens isn't quite as affordable every bit the earlier models in the Art line, but information technology's only around $230 over its predecessor and remains competitive enough to tempt those considering the lower-end models of height-tier brands.

With an 86mm accompaniment thread, and weighing 39.9 oz (1,132g), the new Sigma 85mm F1.4 HSM DG A is larger than any previous models in the Japanese-made Art line also equally those of most competitors, salve perchance for the Otus equivalent from Zeiss.

Improved uniformity, if at the expense of meridian sharpness

The Sigma 85mm F1.4 HSM DG A accomplished a DxO Mark score of 48 points and elevation sharpness 40 P-Mpix on the fifty-MP Canon EOS 5DS R. That's a slightly lower overall score when compared with the Nikon-mountain version of the lens on the 36-MP Nikon D810, just a marginally higher sharpness score. While the results aren't directly comparable due to the difference in the sensors, the 40 P-Mpix sharpness score is mayhap a trivial disappointing for Canon.

In our prototype quality rankings, the Sigma is a whisker backside the Zeiss Apo Sonnar T* 2/135 ZE — the highest performing lens in our database on the Canon EOS 5DS R, and marginally surpasses the outstanding Zeiss Otus 1,4/55 and 1,four/85 in the lab.

As with many modern designs, the Sigma has very loftier sharpness across the image field at the initial aperture. It reaches peak sharpness levels at effectually f/2.eight-4, though it achieves optimum performance beyond the field one end down at f/five.6, with levels decreasing slightly on the Catechism at f/8 due to diffraction. As seen with the Nikon-mount version, the Sigma is well-corrected for both distortion and lateral chromatic aberration. There is some vignetting, even so, and although very low at –0.5EV in the corners, it is unusual in that there's merely a pocket-size fundamental core that's unaffected.

Sigma 85mm F1.4 DG HSM A Canon vs. Sigma 85mm F1.4 EX DG HSM Canon

Sigma was in no hurry to supervene upon its predecessor, the Sigma 85mm F1.four EX DG HSM, equally information technology was already an excellent performer. Indeed, on the still relatively-new 50-MP Canon EOS 5DS R, it's an outstanding performer.

Introduced some seven years ago, it followed the tendency at the time for high center sharpness wide-open, with noticeable softening towards the outer zones. On the Canon EOS 5DS R, this feature continues to f/4, and information technology's not till f/5.6 that the periphery starts to come up close to the operation of the center. By f/8, sharpness levels are in decline, due to the softening effect of diffraction, just it's but and then that sharpness levels are consistent beyond the frame. Chromatic aberration and distortion are both well-corrected on the older model, but it'southward still not in the same league equally the new Art lens.

The new lens has low lateral chromatic aberration across the whole paradigm field, and it remains and so when stopped down. Vignetting on the older model is heavier, simply it'due south too quite typical in its distribution. That contrasts with the new model'due south fall-off across a larger proportion of the image field, which is arguably less attractive visually.

Nevertheless, while the EX lens is still considered an splendid performer overall and reasonably priced at around $969, compared to the outstanding corner-to-corner sharpness of the new model, it's peradventure a lot more different than the scores suggest.

Sigma 85mm F1.iv DG HSM A Catechism vs. Canon EF 85mm f/1.2L Ii USM vs. Carl Zeiss Apo Planar T* Otus 85mm F14 ZE Canon

In our second comparison we've pitched the new Sigma 85mm F1.4 HSM DG A Canon-mount model confronting Catechism's highly-regarded  EF 85mm F1.2L 2 USM and the Zeiss Otus 1,4/85. With a $700 premium for the Canon and an center-watering $3291 actress for the Otus, few would deny that the Sigma already looks attractive. (Zeiss offers the 85mm F1.4 Milvus, which is cheaper at around $1800, simply we've non all the same had a opportunity to test it on the Canon EOS 5DS R.)

Unsurprisingly, perhaps, both the Canon and Otus perform well, especially the newer, more-modern and pricier Otus over the 11-twelvemonth old Canon. With good sharpness in the center at the initial aperture, but with rather high levels of lateral chromatic aberration, Canon's highly regarded L-serial model is beginning to show its age. In contrast, the Zeiss is exceptionally sharp wide-open, slightly sharper even than the Sigma in the middle, and that more or less continues throughout the aperture range. When stopped to f/2.8, the Canon holds upwards well centrally, but has some astigmatism in the outer field, perhaps bookkeeping for its highly-bonny rendering or drawing mode.

By f/five.6, the Canon is almost as sharp across the frame equally the other 2, and has fantabulous symmetry. Where the Sigma scores a few extra points in our metrics is in its control of distortion and to a lesser degree, vignetting, but neither are specially troublesome to correct with software.

Determination

With the introduction of each new model to its Art line, Sigma continues to garner praise every bit a high-cease lens maker, and this new lens secures that status. While all of the full-frame Art line lenses are fantabulous performers, the Sigma 85mm F1.4 HSM DG A is an outstanding case of the maker'southward arts and crafts.

At $i,199, information technology is admittedly unlikely to exist bought on a whim. Yet, non only does it outperform Canon's highly-regarded EF 85mm F1.2L Ii USM, merely it besides displaces the infrequent Zeiss Otus ane,iv/85 equally the best-performing loftier-speed 85mm lens in our database. Quality similar this never comes cheap, they say, and yet Sigma continues to demonstrate that its Fine art line models are the exception rather than the rule.

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Source: https://www.dxomark.com/sigma-85mm-f1-4-dg-hsm-a-canon-mount-lens-review-state-of-the-art/

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