The Sigma 135mm f/1.8 DG AF HSM Art lens with Canon EF, Sony E, Nikon F and Sigma mounts is a member of Sigma's Art family characterized by its advanced optical construction and robust design. The combination of low-dispersion FLD and SLD elements helps to reduce chromatic aberrations, while a pair of aspherical elements, one of which is at the rear of the lens, further minimizes distortion and aberration. The optical design of 13 elements in 10 groups delivers consistent peripheral brightness and sharpness, even at a maximum aperture of f/1.8. A Super Multi coating has been applied to the lens elements to reduce flare and ghosting.
It has an efficient hypersonic motor that is fast, smooth and quiet. Nine rounded diaphragm blades contribute to a pleasing out-of-focus quality with shallow depth of field.
The Sigma 135mm f/1.8 DG AF HSM Art lens with Canon EF, Sony E, Nikon F and Sigma mounts is a member of Sigma's Art family characterized by its advanced optical construction and robust design. The combination of low-dispersion FLD and SLD elements helps to reduce chromatic aberrations, while a pair of aspherical elements, one of which is at the rear of the lens, further minimizes distortion and aberration. The optical design of 13 elements in 10 groups delivers consistent peripheral brightness and sharpness, even at a maximum aperture of f/1.8. A Super Multi coating has been applied to the lens elements to reduce flare and ghosting.
It has an efficient hypersonic motor that is fast, smooth and quiet. Nine rounded diaphragm blades contribute to a pleasing out-of-focus quality with shallow depth of field.
Sigma's Art family lens 135mm f/1.8 DG HSM, this lens provides a strong perspective compression effect, while its large diameter with F1.8 brightness provides a stunning bokeh effect, minimising axial chromatic aberration, making this effect not only impressive, but also beautiful, while providing superb contrast and image quality in every shot. By incorporating the latest innovations in design and optical glass and rethinking every aspect of the lens, SIGMA has ensured exceptional image quality right to the edge of the image, setting the new standard in 135mm telephoto lenses.
In addition to optimised power distribution, this lens features two SLD (Super Low Dispersion) and two FLD ("F Low Dispersion") elements. These technologies help minimise chromatic aberrations, which tend to appear in the out-of-focus bokeh area in portraits, as well as on thin objects such as branches. The end result is extreme resolution and clarity throughout the image, even at the widest aperture.
To deliver the high resolution capable of bringing out the best in DSLRs of 50 megapixels or more, the focusing mechanism features SIGMA's floating system. No matter what the distance from the subject, this lens delivers superior performance from the centre to the edges of the image. By also minimising distortion, the lens delivers impeccable image quality, without the need for digital adjustment during image processing.
The 135mm focal length offers a surprisingly compressive effect: even at close range to the subject, the telephoto ring allows a variety of dramatic perspectives to be established, and the large diameter with F1.8 brightness makes possible a full-length shot with impressive background bokeh. In short, this lens gives the photographer a full range of compositional options.
Most chromatic aberration can be eliminated by combining a high-refractive convex element with a low-refractive concave element, however, residual chromatic aberration known as "secondary spectrum" may remain. To minimise this secondary spectrum, which can be a serious problem in conventional lenses, this lens offers up to three types of exclusive low dispersion glass that offer superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD ("F" Low Dispersion). In particular, FLD elements offer ultra-low dispersion in combination with high transmittance and the anomalous dispersion characteristics of fluorite. The meticulous deployment of these unique types of low dispersion glass and the optimisation of the energy distribution provides superlative image reproduction without being diminished by residual chromatic aberration.
For optimum optical performance and satisfactory ease of use, this lens incorporates the latest technology, including a large hypersonic motor (HSM), dust- and splash-proof construction and other high-end features. The Hypersonic Hyper Sonic Motor (HSM) delivers ample torque to the focusing group for exceptional speed, ensuring exceptionally stable performance even at low speeds. Together with the optimised AF algorithm, this function offers the ability to shoot with fast autofocus. In addition, the focus limiter makes AF very accurate at a distance from the subject for even more agile performance.
The Full-time manual focus function allows the lens to switch to manual focus by simply turning the focus ring, although this may vary depending on the mount type. The Nikon camera version of this lens includes the electromagnetic diaphragm mechanism capable of receiving the appropriate signals from the camera body. This feature ensures precise aperture control and stable automatic exposure (AE) performance during continuous shooting.
Data sheet
Specific References
| Construcción del objetivo | 13 elementos en 10 grupos |
| Apertura mínima | F16 |
| Diámetro del filtro | φ82㎜ |
| Ángulo de visión (35mm equivalente) | 18.2° |
| Distancia mínima de enfoque | 87.5cm/34.4in. |
| Dimensiones (Diámetro x Longitud) | Φ91.4mm × 114.9mm/4.0in. x 4.5in. |
| Número de láminas del diafragma | 9 (Diafragma circular) |
| Ampliación máxima | 1：5 |
| Peso | 1.130g |
| Monturas disponibles | SIGMA / NIKON / CANON / SONY-E |
