The Sigma 18-35mm f1.8 DC HSM lens is the first wide-angle zoom lens (as of 22 April 2013) to achieve a maximum aperture of f1.8 throughout the entire zoom range. The Sigma 18-35mm is a standard zoom lens offering a focal length range equivalent to 27-52.5mm in 35mm format. The 9-blade rounded diaphragm creates an attractive round bokeh at wide aperture settings, while the HSM (Hyper Sonic Motor) ensures silent and fast autofocus. This lens incorporates a large moulded glass aspherical lens element with special low dispersion (SLD) glass to compensate for aberrations and curvature at the widest wide angle. Its new Global Vision design works with its compatibility with the Sigma USB dock for further customisation. Sigma's DC lenses are designed for cropped sensors and the image circle of this lens is designed to match the smaller image sensor size of small format sensor cameras (DX format on Nikon and EF-S on Canon). The lens is ideal for landscapes, portraits, still life, snapshots, casual photography and close-ups.
Key features
- Fast constant aperture f/1.8
- Designed for APS-C size (cropped) sensors
- 35mm equivalent focal length: 28.8-56mm
- Hyper Sonic AF Motor for silent and fast autofocus
- Internal focus and zoom
- 4 aspherical elements and 5 SLD glass elements
- Superior multi-layer coating
- Canon mount
- Compatible with the Sigma USB dock
Sigma: Terminology
Art Lens
Designed for those who see photography as a critical form of self-expression, our Art range offers sophisticated optical performance and abundant expressive power to faithfully meet your artistic vision.
ASP
The aspherical lens complex allows design freedom, improved performance, a reduced number of component lenses and a compact size.
DC
These are special lenses designed for APS-C size sensors so that the image circle matches the smaller image sensor size of most digital SLR cameras. Their specialised design gives these lenses ideal properties for digital cameras, with compact and lightweight construction as an added bonus!
HSM
This lens uses a motor driven by ultrasonic waves to deliver silent and fast autofocus.
IF
To ensure focus stability, this lens moves the internal lens group(s) without changing the physical length of the lens.