Sigma AF 70-200mm f/2.8 APO EX DG Macro HSM Zoom Lens for Canon
Large aperture zoom lens designed specially for digital SLR cameras with close-up capability.
This large aperture telephoto zoom lens has a minimum focusing distance of 100cm (39.4") throughout the entire zoom range. It is very convenient for close-up photography. This lens uses two ELD (Extraordinary Low Dispersion) glasses and two SLD (Special Low Dispersion) glasses for utmost correction against chromatic aberrations.
This lens’ super multi layer lens coating reduce flare and ghost, which is a common problem with digital cameras. This lens incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed AF. The lens design incorporates an inner focusing and inner zooming systems. The overall length of the lens does not change during focusing and zooming, ensuring convenient handling. When this lens is used with the 1.4x EX DG APO or 2x EX DG APO Tele Converters (optional), it becomes a 98-280mm F4 AF telephoto zoom lens or a 140-400mm F5.6 AF telephoto zoom lens respectively.
Key Features
- Minimum focusing distance of 100cm, maximum magnification of 1:3.5.
- The super multi layer lens coating and lens design reduce flare and ghost.
- ELD and SLD lenses for correction of aberrations.
- HSM ensures a quiet and high-speed AF.
- APO - In order to attain the highest quality images, the APO lens has been made using special low-dispersion (SLD) glass and is designed to minimize color aberration.
SIGMA's APO zoom lenses minimize color aberration. As the refractive index of glass depends on the wavelength of light, color aberration occurs when different colors form images at different points. This problem often occurs with telephoto lenses, but the Special Low-Dispersion (SLD) glass and
Extraordinary Low Dispersion (ELD) used in SIGMA's APO lenses helps to compensate for color aberration, thereby allowing them to produce of sharp images.
- EX. - EX Lens
The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance.
- HSM. - Hyper-Sonic Motor
This lens uses a motor driven by ultrasonic waves to provide a quiet, highspeed AF.
- IF - Inner Focus
To ensure stability in focusing, this lens moves the inner lens group or groups without changing the lens' physical length.
- DG - DG Lens
The most suitable lenses for 35mm film single-lens reflex cameras, as well as for digital SLR cameras. Sigma's development of the DG (Digital) range of lenses has concentrated on the correction of distortion and aberrations. Magnification of chromatic aberration is particularly conspicuous with digital cameras. The optical designs and cutting-edge technology incorporated by Sigma eliminate flare and ghosting from te image sensor and create excellent color balance. Vignetting is minimized whilst marginal illumination is ensured. These high performance lenses are equally suited for digital and analogue cameras.
Maria Mrasek
Walnut Creek, CA
"Mamma"s Girl"
