The Sigma 18-35mm F1.8 DC HSM lens features a maximum aperture of f/1.8 throughout the zoom range. This lens is ideal for portraiture and indoor photography. It's a good combination of a wide range of focal lengths in a compact design. The 9 blade rounded diaphragm creates an attractive round bokeh at large-aperture settings.

Designed to minimize flare and ghosting
Flare and ghosting were thoroughly measured and monitored from an early stage in the lenses development to establish an optical design which is resistant to strong incidental light such as backlight. The Super Multi-Layer Coating reduces flare and ghosting and provides sharp and high contrast images even in backlit conditions. Attaching the matched petal type hood, which is supplied, will provide extra protection from flare and ghosting.