Sigma has announced a brand new 85mm f/1.4 DG DN Art lens for full-frame mirrorless cameras, designed specifically for E-Mount and L-Mount cameras, it uses in-camera correction to correct for vignetting, and distortion, which has allowed Sigma to make the lens smaller than normal, whilst delivering a high level of image quality. The lens is weather-sealed, with a dust and splash-proof design. The lens has a recommended price of £999, and the lens will be available from the 27th August.

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From Sigma: SIGMA 85mm F1.4 DG DN A | Art

Designed exclusively for full-frame mirrorless cameras. Redefining the classic

• Class-leading optical performance
• Exceptionally lightweight and compact
• Superb build quality and impressive feature set

The first ever F1.4 DG DN Art lens is here, marking a new chapter in SIGMA’s mirrorless journey. This stunning, full-frame prime, designed from the ground up specifically for mirrorless cameras, offers unparalleled optical performance, a compact and lightweight body, robust build quality and high-speed AF. A remarkable triumph of optical design and engineering, it promises to be a game-changer for E-mount and L-Mount photographers.

Although it’s less than 55% of the weight of the existing 85mm F1.4 DG HSM | Art*, the all-new 85mm F1.4 DG DN | Art actually offers improved image quality. Whatever the shooting conditions it produces exceptionally sharp results right across the frame, gives a clear and delicate rendering performance, and displays beautiful, rich bokeh, making it the perfect option for portrait, wedding and event photographers. The lens boasts five Special Low Dispersion (SLD) elements and one aspherical element to help to control optical aberrations including chromatic aberration, flare and ghosting.

Despite having a remarkably small and lightweight body for such a wide-aperture optic, the 85mm F1.4 DG DN | Art is packed with a range of functionalities including a dust- and splash-proof barrel, a lockable and de-clickable iris ring and a customisable AFL button. The lens also comes with a lockable lens hood.

This fully reimagined 85mm F1.4 DG DN | Art is SIGMA's vision of the ultimate portrait lens for the mirrorless age, and with it, SIGMA proposes a whole new world of possibilities thanks to the lens’ unprecedented level of portability and quality.

* Measurements for L-mount versions.

Key features

1. Class-leading optical performance

An 85mm focal length and F1.4 aperture are specifications almost synonymous with a professional portrait lens. As with all Art line lenses, SIGMA has pursued the highest possible optical performance and employed the latest design and production technologies at SIGMA’s factory at Aizu, Japan. The optical design of the lens is completely different to the existing 85mm F1.4 DG lens in SIGMA’s current line-up.

In addition to five SLD elements and one aspherical element, the 85mm F1.4 DG DN | Art has incorporated the latest high-refractive-index glass, which works to correct aberrations that cannot be effectively handled by in-camera correction. With a particular emphasis given to the elimination of axial chromatic aberration, users will enjoy sharp images with no color bleeding all the way up to the maximum aperture of F1.4.

The high resolving power across the entire image from the centre to the edges of the frame ensures exceptional sharpness of the in-focus area, and coupled with a very shallow depth-of-field it’s easy to separate the subject from the background for captivating, high-impact portraits.

Numerous rounds of ray-trace simulations, as well as repeated real-world testing enabled SIGMA’s lens designers to minimise flare and ghosting, which has ensured clear, high-contrast images even when shooting in backlit conditions.

Photographers can work wide open at the maximum aperture of F1.4 with total confidence, allowing them to focus fully on creative decisions such as composition, exposure and depth-of-field. This new 85mm prime delivers a level of optical performance truly worthy of its place in SIGMA’s Art range.

2. Exceptionally lightweight and compact

The 85mm F1.4 DG DN | Art weighs in at 630g with a filter size of 77mm and a body length of 94.1mm, making it far smaller and lighter than SIGMA’s original 85mm F1.4 Art lens, which weighs 1215g*. Designed exclusively for mirrorless cameras, it breaks the usual 85mm F1.4 mould by combining a very large lens diameter, superb optical performance and a lightweight and compact body.

The AF system employs a stepping motor that is optimised for both phase-detect and contrast AF. Not only does this provide a smooth shooting experience only possible on a mirrorless camera (such as face/eye AF), but it has reduced the size of the lens body thanks to a much smaller focus element. By making the most of in-camera aberration correction functionalities, SIGMA was able to concentrate on the correction of aberrations that could only be eliminated effectively by the lens’ optics, which further contributed to making the lens smaller. With such a small and lightweight body, users can now take out an ultra-wide aperture 85mm lens for day to day shooting, or carry it around all day at a wedding, without worrying about being weighed down.

* Measurements for L-mount version.

3. Superb build quality and impressive feature set

This compact lens is packed with a range of advanced functionalities that make it well-suited to professional use by both photographers and filmmakers.

The 85mm F1.4 DG DN | Art has a newly introduced iris ring lock switch, which allows users to lock the iris ring either at auto, or between apertures F1.4-F16. This prevents unintended movement of the ring from auto to manual, or vice versa, during shooting so users can focus on creating their shot. There is a Focus Mode Switch on the lens barrel, and an AFL button that allows various functions to be assigned from the camera body according to user preference*.

In addition to the dust- and splash-proof structure, the 85mm F1.4 DG DN | Art uses materials such as aluminum and TSC (Thermally Stable Composite) to achieve superb Art-line build quality, but with weight kept to a minimum. In addition to the durability of the body, SIGMA’s lens designers have paid particular attention to the experience of using this lens, achieving an ultra-smooth movement on the iris and focus rings, and the precise, easy switch action.

*Limited to compatible cameras.  Also, the functions depend on the camera.
                       

Additional features

• Lens construction: 15 elements in 11 groups, with 5 SLDs and 1 aspherical element
• Compatible with high-speed autofocus
• Compatible with lens-based optical correction
  *Only on camera models that support this functionality. Scope of correction varies depending on camera.
• AFL button
• Focus mode switch
• Dust- and splash-proof
• Hood with lock
• Compatible with SIGMA USB DOCK UD-11 (sold separately, for L-Mount only)
• Designed to minimize flare and ghosting
• Every single lens undergoes SIGMA's proprietary MTF measuring system
• 11-blade rounded diaphragm
• High-precision, durable, brass bayonet mount
• ‘Made in Japan’ craftsmanship

To learn more about SIGMA's craftsmanship, please visit

https://www.sigma-global.com/en/lenses/

Key specifications -  The figures below are for L-mount.

• Lens construction: 11 groups, 15 elements (5 SLDs and 1 aspherical lens)
• Angle of view: 28.6° | Number of diaphragm blades: 11 (rounded diaphragm)
• Minimum aperture: F16 | Minimum focusing distance: 85cm / 33.5in.
• Maximum magnification ratio: 1:8.4 | Filter size: 77mm
• Maximum dimensions x length:  82.8mm x 94.1mm / 3.3×3.7in.
• Weight: 630g / 22.2oz.