https://www.bhphotovideo.com/c/product/1282165-REG/sigma_321955_85mm_f_1_4_dg_hsm.html
“We are thrilled to announce three state-of-the-art additions to the Global Vision line. The Sigma 85mm 1.4 Art has been a highly requested lens and we are very confident those customers who have been waiting for us to deliver this lens will be more than pleased with the superior optical performance and zero compromise,” states Mark Amir-Hamzeh, president of Sigma Corporation of America. “In addition, the re-engineered 12-24mm F4 and highly competitive 500mm F4 Sport lens both embody the world-class performance our Global Vision lenses are known for. We look forward to seeing the incredible images our customers will create using these new Sigma lenses.”
Sigma 85mm F1.4 DG HSM Art – The Ultimate Portrait Lens
Delivering the ultimate in creative expression, the new Sigma 85mm F1.4 Art lens is engineered to support the highest resolution sensors on the market with an exceptional degree of sharpness. The high-performance optical system is purpose-built by Sigma R&D to produce the attractive bokeh effect sought after by discerning photographers. The lens’ advanced architecture features two SLD (special low dispersion) glass elements and one glass element with a high rate of anomalous partial dispersion and refraction. A re-engineered AF system brings 1.3X the torque of its predecessor, while other features such as a full-time manual focus override have been added, which can be controlled when the focus ring is rotated, even during continuous AF.
The Sigma 85mm F1.4 DG HSM Art lens supports Canon, Nikon and Sigma mounts. The Nikon mounts feature a brand new electromagnetic diaphragm.
The Sigma 85mm F1.4 Art lens will be available in late October and retails for a recommended street price of $1199.00 USD.
Sigma 85mm f/1.4 DG HSM ART Lens Deal for $799
Review
Center sharpness is from very good to top from f/1.8 all the way through to the minimum aperture of f/16. The edges are almost as sharp as the center, with f/2.8 to f/16 producing the sharpest results.
https://www.photographyblog.com/reviews/sigma_85mm_f1_4_dg_hsm_fe_review/sharpness_1/
Sony version is in stock
https://www.amazon.com/Sigma-85mm-1-4-Lens-Sony/dp/B07B9W4DNB/
Sigma continues to produce exceptionally sharp portrait lenses. Even used wide open at ƒ/1.4, on a full-frame body, the lens produced virtually no corner softness. With a lens at this level of quality, the only reason you want to stop down is to direct how much depth-of-field you want in your image; there is no need to consider the effect on sharpness.
http://www.imaging-resource.com/lenses/sigma/85mm-f1.4-dg-hsm-art/review/
Review
Sigma is extremely sharp lens even wide-open, so much so that as you stop the lens down, you actually start to see the affects of diffraction much earlier than we would normally expect. Best sharpness is achieved centrally when the lens is stopped down to around F4 and at F5.6 in the corners.
Review
Tests showed that the new lens delivers excellent optical performance: it's very sharp across a full-frame sensor right up into the corners whether at infinity or normal distances. It produces the sharpest FF/FX-corners of any 85mm we've seen with very low coma.
http://www.cameralabs.com/reviews/Sigma_85mm_f1-4_DG_HSM_Art/
Review
The previous resolution record belonging to the Otus 1.4/28 the Sigma managed to beat at three next apertures - f/2.0, f/2.8 and f/4.0.
http://www.lenstip.com/491.1-Lens_review-Sigma_A_85_mm_f_1.4_DG_HSM_Introduction.html
This lens performs very impressively at f/1.4 and with a slight contrast improvement at f/2, this lens is basically unphased by the ultra-high resolution of the Canon EOS 5Ds R test camera. All four extreme full frame corners appear identical and they are only very slightly less sharp than the center of the frame. The biggest stopped down difference seen in the corner is reduction of vignetting.
http://www.the-digital-picture.com/Reviews/Sigma-85mm-f-1.4-DG-HSM-Art-Lens.aspx
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