Pairing a versatile range of telephoto focal lengths with a fast constant maximum aperture, this Sigma 50-100mm 1.8 DC HSM CANON provides an 80-160mm equivalent focal length range. The bright constant maximum aperture offers consistent low-light performance throughout the zoom range and also affords greater control over focus placement for shallow depth of field and selective focus applications.
Complementing the versatile telephoto range is a sophisticated optical design that incorporates three F Low Dispersion elements, one Special Low Dispersion element, and one high-refractive index, high-dispersion glass element.
This combination of low dispersion designs works to noticeably reduce chromatic aberrations and color fringing throughout the zoom range, as well as deliver a high degree of contrast and clarity. Additionally, a Super Multi-Layer Coating has been applied to lens elements to reduce lens flare and ghosting to benefit working in strong lighting conditions.
An unprecedented combination of focal length and speed, the “Sigma 50-100mm” 1.8 DC HSM CANON, on sale at Foto Discount World, offers a variety of favoured telephoto perspectives in combination with a flexible maximum aperture.
Complementing the imaging capabilities is a refined physical construction with internal focus and zoom mechanisms to limit the overall length of the lens during use. A Hyper Sonic AF motor affords quick focusing speeds and quiet performance as well as the ability to manually override focus at any time for greater control.
Also suiting quick shooting applications, the nine-blade diaphragm has been constructed from fluorine-coated polycarbonate, along with a carbon feather film for exceptionally smooth, controlled performance when photographing at high shooting speeds. Contrasting this, a tripod collar is integrated into the design, too, for greater stability when working atop a tripod or monopod.
- Impressively fast f/1.8 constant maximum aperture benefits working in difficult lighting conditions throughout the zoom range and also offers increased control over focus when working with selective focus techniques.
- Three F Low Dispersion elements and one Special Low Dispersion element markedly reduce chromatic aberrations and color fringing throughout the zoom range. Additionally, one high-refractive index, high-dispersion glass element controls spherical aberrations for increased clarity and sharpness.
- A Super Multi-Layer Coating has been applied to lens elements in order to minimize lens flare and ghosting and contribute to producing contrast-rich and color-neutral imagery, even in backlit conditions.
- The integrated HSM (Hyper Sonic Motor) realizes quick and quiet autofocusing, which is further complemented by an optimized AF algorithm to produce smoother focusing performance. The HSM also permits full-time manual focus control simply by rotating the focus ring at any time.
- An inner zoom and inner focus design limits the overall length of the lens during operation for more intuitive, controlled handling as well as faster performance.
- The rounded nine-blade diaphragm is constructed from durable, fluorine-coated polycarbonate and also features a carbon feather film for smooth performance when working with fast continuous shooting rates.
- The Sigma 50-100mm 1.8 DC HSM CANON lens is constructed using a Thermally Stable Composite (TSC) material, along with traditional metals, for greater precision and use in wide temperature variations. The outside of the lens barrel is also engraved with the year of production.
- The bayonet mount is constructed from brass for ensured accuracy and durability.
- A fixed, rotating tripod collar offers increased stability when working from a tripod and integrates 90° click stops for intuitive switching between horizontal and vertical shooting orientations.
- The Sigma 50-100mm 1.8 DC HSM CANON lens is compatible with the optional Sigma USB Dock for fine-tuning different lens characteristics and updating its firmware.
Great low light performance
The wide open f/1.8 maximum aperture ensures optimal light performance throughout the entire zoom range so you can get sharp results in extreme light conditions
Spectacular bokeh and super-narrow depth of field
The combination of the telephoto zoom range, fast aperture, 9-blade rounded diaphragm and high quality glass elements makes this lens ideal for photographers who wish to separate their subject from the background.
FLD glass, SLD glass, and high-refractive index, high-dispersion glass
The Sigma 50-100mm Art uses a combination of three FLD (F Low Dispersion) glass elements, one SLD (Special Low Dispersion) glass element, three high-refractive index SLD glass elements, and one high-refractive index, high-dispersion glass element to reduce axial and transverse chromatic aberration. By including one or more low-dispersion element in every element group, this lens ensures outstanding image quality throughout the zoom and focal range.
Hyper Sonic Motor autofocus with full time manual override
The Sigma 50-100mm f1.8 Art features a slimmer and enhanced version of Sigma’s Hyper Sonic Motor (HSM) autofocus motor. The motor delivers near-silent, smooth, accurate and fast autofocus that can be manually adjusted without needing to use a mode switch.
Inner focus and inner zoom
Thanks to SIGMAs inner focus and inner zoom technologies, adjusting the focus and zoom rings does not change the length of the lens, and turning the zoom ring is not prone to cause focus shift.
Designed to minimize flare and ghosting
From the start of the design process, SIGMA measured flare and ghosting to establish an optical design that is resistant to strong incidental light sources such as backlight. At the prototyping stage, SIGMA used not only simulations but actual photographic experiments to assess flare and ghosting under multiple criteria, identify the causes of these issues under a wide range of situations, and take measures to mitigate them. In addition, SIGMAs Super Multi-Layer Coating helps further reduce flare and ghosting and provide sharp, high-contrast images even in backlit conditions.
Designed to minimize flare and ghosting
From the start of the design process, SIGMA measured flare and ghosting to establish an optical design that is resistant to strong incidental light sources such as backlight.
At the prototyping stage, SIGMA used not only simulations but actual photographic experiments to assess flare and ghosting under multiple criteria, identify the causes of these issues under a wide range of situations, and take measures to mitigate them. In addition, SIGMAs Super Multi-Layer Coating helps further reduce flare and ghosting and provide sharp, high-contrast images even in backlit conditions.
Exclusive low-dispersion glass
The degree to which light is refracted by glass depends on the light’s wavelength. This fact causes different colors of light to focus at slightly different points. The result is chromatic aberration, the color fringing that is particularly noticeable in telephoto lenses. Most chromatic aberration can be removed by combining a high-refractivity convex lens element with a low-refractivity concave element.
Yet residual chromatic aberration known as secondary spectrum may still remain. To minimize this secondary spectrum, which can be a serious issue with conventional lenses, SIGMA lenses feature up to three types of exclusive low-dispersion glass offering superior performance:
ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD (F Low Dispersion). In particular, FLD glass offers ultra-low dispersion in combination with high transmittance and the anomalous dispersion characteristics of fluorite.
Meticulous deployment of these types of exclusive low-dispersion glass and optimization of power distribution gives SIGMA lenses superlative image rendition undiminished by residual chromatic aberration.