Sigma 120-300mm F2.8 DG OS Sports Series HSM Lens

The Sigma 120-300mm F2.8 DG OS HSM-Lens is Sigma's first product from their "Sports" interchangeable lens product line with an F2.8 maximum aperture. Offering sophisticated optical expressiveness and perfomance especially for those who needs a lens that could deliver high-capture performance so they could get any shot that they want. Its wide range of various functions, such as an adjustable range of auto focusing, will aid photographers in any challenging scenarios and conditions. One other feature that makes it ideal for sports photography is its excellent durability for having dust-proof and splash-proof parts. The Hyper Sonic Motor (HSM) ensures a high-speed, and silent AF function, and enables sensible full-time manual focusing by simply rotating the focus ring. The OS (Optical Stabilizer) is incorporated to minimize camera shake. It is compatible with APS-C and Full Frame Sensor DSLR Cameras.

Aside from sports photography, this lens would also be ideal for adventurers to take nature shots whether for animals, natural environments, or any other adventure. 

Get your adrenaline pumping along with this Sigma 120-300mm F2.8 DG OS HSM-Lens!

Product Features in Detail

Dust-proof and splash-proof construction
For professional purposes, Sigma has achieved excellent durability by incorporating dust-proof and splash-proof parts for joint parts, such as mount attachment, manual ring, zoom-ring, switches for customization and external switch panels. It prevents dust and dirt from entering the lens. Also, the usage of the zoom ring and focus ring is well positioned for shooting situations.

High image quality close to fixed focal length lens
This lens incorporates 2 FLD (“F” Low Dispersion) glass elements, which have performance equal to fluorite, 1 SLD (Special Low Dispersion) glass element, and compensate for the color aberration at the utmost. The design also compensates for sagittal coma flare and minimizes the blurring of a point light source in peripheral areas. It offers very high image quality, close to fixed focal length lens.

Incorporation of focus limiter
Excellent usability is achieved by incorporating inner focusing and zooming that requires no change in the length of the lens for focus and zoom. It is possible to use with a rounded filter, such as a Circular Polarizer, as the front part of the lens is fixed. Due to the focus limiter offering adjustable range of auto focusing, this lens can provide fast focus setting. The USB dock enables users to change the range of the auto focusing at the discretion of users' creativity.

Newly developed “USB DOCK” exclusively for new product lines
Based on these new lines, Sigma have developed special software (SIGMA Optimization Pro) that can update the lens firmware and adjust parameters such as focus. In addition, the lenses from their Sports line have customizable AF speed, focus limiter and OS function. The “Custom Mode Switch” is the device for further customization on the dedicated lenses.

Ease of use
Many parts of this lens have been designed for comfortable usage. For example, the design of the zoom ring is concerned with a texture when you hold it, the position of printed letters and the 4 control switches with integration-considered shape of the screws. Included accessories such as the removable lens hood and the newly designed tripod collar with strap ensure added ease of use.

Flare and ghosting conscious design
In order to achieve high rendering on this flagship lens, flare and ghosting were thoroughly measured from an early stage to establish an optical design which is resistant to strong incident light such as backlight. The Super Multi-Layer Coating reduces flare and ghosting and provides sharp and high contrast images even in backlit conditions.

Excellent in handheld photography for telephoto shooting
This lens incorporates the OS system which offers the use of shutter speeds approximately  4 stops slower than would otherwise be possible, ensuring the excellent use in handheld photography for telephoto shooting. The OS system has two modes - OS mode 1 is suitable for general photography, and OS mode 2 is best for panning shots of subjects such as planes or racing cars. It is possible to adjust the OS using the optional USB DOCK.

Quiet and Fast AF
The HSM (Hyper Sonic Motor) ensures high speed and quiet AF as well as full-time manual focus override by rotation of the focus ring. With the enhanced AF algorithm, smoother AF is achieved. The full time manual, which offers further adjustment after focusing with AF mode, is possible. By using USB Dock, you can change and adjust the AF speed at your convenience.

Incorporating Rounded Diaphragm
The 9 blade-rounded diaphragm creates an attractive blur to the out-of-focus areas of the image.

APO Tele-Converter (Optional)
The addition of Sigma's 1.4x EX DG APO or 2x EX DG APO TELE CONVERTER produces a 168-420mm F4 AF telephoto zoom lens or a 240-600mm F5.6 AF telephoto zoom lens respectively.

Brass made bayonet mount
This lens incorporates a brass made bayonet mount which has both high accuracy and durability. A special treatment to reinforce its strength is applied to the surface giving it greater strength and making it highly resistant to long-term use.

Evaluation with Sigma's own MTF measuring system “A1”
Sigma used to measure lens performance with an MTF measuring system using conventional sensors. However, they've now developed their own proprietary MTF (modulation transfer function) measuring system (A1) using 46-megapixel Foveon direct image sensors. Even previously undetectable high-frequency details are now within the scope of their quality control inspections. The SIGMA 120-300mm F2.8 DG OS HSM will all be checked using this “A1” before they are shipped.