DC Lens
SIGMA High-Performance Lens Series
SIGMA Advanced Lens Technology
These are dedicated digital SLR camera lenses with an image circle
designed to suit image sensors that correspond to APS-C size. In-house
technology accumulated through the development of our digital SLR
camera was used to optimize optical performance for our digital lenses.
This is a high-performance lens series that fuses technology such as lens
power layout and coating design with the know-how Sigma has built up
over many years of developing interchangeable lenses for SLR cameras.
By reducing the diameter of the image circle, Sigma has achieved a more
compact, lightweight lens series.
* An image sensor larger than those corresponding to the APS-C size cannot be used in digital SLR
cameras, 35 mm SLR cameras, or APS film SLR cameras. If such an element is used, vignetting will occur
on the picture surface. The angle of view varies depending on which camera model the lens is used with.
35mm format is approximately 1.5 - 2.0 times the focal length of the lens being used.
DG Lens
These are high-performance lenses optimized for digital cameras. They are
ideal not only for 35 mm digital SLR cameras and film SLR cameras but
also for APS-C digital SLR cameras. They deliver superior image quality by
correcting for all types of aberration, especially distortion, and they have
high resolution capability because they minimize chromatic aberration of
magnification, which is particularly a problem for digital cameras.
What is more, these lenses incorporate optical designs optimized for digital
cameras and Sigma's own Super Multi-Layer Coating technology, so they
reduce flare and ghosting due to reflection between the image sensor and
lens surfaces, and they provide high contrast and a wide range of tone.
They also provide enough peripheral brightness with little vignetting.
Aspherical Lens
Optical Stabilizer (OS)
Hyper-Sonic Motor (HSM)
Rear Focus
Inner Focus
Teleconverter-Compatible Lens (CONV)
The "CONV" mark designates lenses that can be used with the APO
Teleconverter EX (sold separately). The teleconverter increases the focal
length and interfaces with the AE (automatic exposure) function of the lens.
IF lenses are equipped with a focusing system that moves the inner lens
group without changing the physical length of the lens, thereby ensuring
excellent stability in focusing.
RF lenses are equipped with a focusing system that moves the rear lens
group for high-speed, silent focusing.
HSM lenses are equipped with a motor driven by ultrasonic waves.
The motor makes high AF speeds and quiet shooting a reality.
This is a feature built into lenses that compensates for camera shake.
It dramatically expands the realms of photography by alleviating camera
movement when shooting handheld.
APO Lens
Using ELD, SLD, and other special low-dispersion glass, these lenses are
designed to minimize chromatic aberration and deliver the best image quality
possible.
The aspherical lens complex allows freedom of design, with high lens
performance, reduced number of components, and compact size.
EX Lens
With uncompromised design ideas and high-level optical technology and
handling, these lenses, which are Sigma's representative lenses, meet the
requirements of photographers at the highest level.
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