Built with 21 elements in 15 groups, the Sigma 100-400mm f/5-6.3 DG OS HSM Lens contains four SLD glass elements that reduce aberrations. Likewise, it features multi-layer coating to block unwanted reflections that can cause ghosting and flaring. Though this lens has a 160-640mm equivalent focal length range, it is also equipped with a 1:3.8 Macro feature that enables closer shooting. As you take advantage of the lens' f/5-6.3 maximum aperture, you may also use the push/pull zoom mechanism to adjust the focus. Speaking of which, the Hyper Sonic Motor trigger fast and smooth Autofocus that locks in the subject instantly. Camera shake that can cause image blur is no problem due to its optical stabilizer while the 67mm filter diameter can be maximized to enhance every image. Stunning out of focus effects can be achieved through the nine-blade rounded diaphragm. Sporting a dust-proof and splash-proof mount, the Sigma 100-400mm f/5-6.3 DG OS HSM Lens performs well even under unfavourable weather thanks to its Thermally Stable Composite.
Product Features in Detail
Compact packaging with uncompromising image quality
In designing this lens, SIGMA strived to push both compactness and image quality to the limit. Four SLD glass lens elements and an optimized power distribution help minimize optical aberrations. Moreover, by taking special care to minimize transverse chromatic aberration, which cannot be corrected via aperture control, SIGMA has ensured outstanding image quality throughout the zoom range.
Telephoto plus macro functionality
With a minimum shooting distance of 160cm and a maximum magnification ratio of 1:3.8, this lens can shoot either from a distance or up close.
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.
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, SIGMA’s Super Multi-Layer Coating helps further reduce flare and ghosting and provide sharp, high-contrast images even in backlit conditions.
All-new optical stabilizer (OS) unit with exclusive algorithm
Featuring a newly developed gyroscopic sensor and a new and exclusive algorithm, the all-new OS unit provides a powerful stabilization effect. An acceleration sensor detects camera shake in any direction—horizontal, vertical, or diagonal. This technology allows the OS to stabilize the image very effectively, regardless of whether the camera is being held in horizontal or vertical orientation.
Push/pull zoom mechanism incorporated
For quick control of the angle of view, the zoom ring incorporates a push/pull mechanism in addition to the regular twist mechanism. The exclusive lens hood has also been designed to accommodate push/pull zooming and overall lens maneuverability. By making it possible to adjust the angle of view instantly, this lens gives photographers an even better chance of getting that crucial shot.
Nikon electromagnetic diaphragm mechanism included
The Nikon mount version of this lens includes an electromagnetic diaphragm mechanism that allows it to receive the appropriate signals from the camera body. This feature ensures precision diaphragm control and stable Auto Exposure (AE) performance during continuous shooting.
Newly designed Teleconverters (Optional)
Teleconverters that are newly designed to match the new lens line-ups can be attached. The addition of SIGMA’s TELECONVERTER TC-1401 or TELECONVERTER TC-2001 produces a MF 140-560mm F7-9 hyper-telephoto zoom lens or a MF 200-800mm F10-12.6 hyper-telephoto zoom lens respectively.
High-precision, rugged brass bayonet mount
The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.
Dust-proof and splash-proof mount
The lens mount incorporates rubber sealing to protect the mount from dust and water drops.
Smoother AF operation
The HSM (Hyper Sonic Motor) ensures high speed and quiet AF. The updated algorithm enables smoother AF operation.
Compatible with Mount Converter MC-11
Mount Converter MC-11 allows you to use your SIGMA SA mount and SIGMA EOS mount (Canon-compatible) interchangeable lenses with the Sony E-mount camera body. Enjoy the world of ultra-telephoto zoom lens with Sony E-mount cameras.
Sigma USB Dock
With the optional SIGMA USB DOCK, you can update your lens firmware and adjust the focus position and other settings. Simply connect the lens to the SIGMA USB DOCK and the dock to a computer to use the dedicated SIGMA Optimization Pro software and perform various types of customization and adjustment.
Sigma Global Vision
We used to measure lens performance with a Modulation Transfer Function (MTF) measuring system using conventional sensors. However, we have developed our own proprietary MTF measuring system (A1)* using 46-megapixel Foveon direct image sensors. Even previously undetectable high-frequency details are now within the scope of our quality control inspections. All SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary lenses are checked using this A1 system before they are shipped.
