The Sigma 135mm is a part of the Sigma ART family of lenses. This is an ideal lens for portraiture and sports, the 1.8 aperture and 9 diaphragm blades make for a shallow depth of field and a beautiful, smooth bokeh.
Sigma has integrated a Hyper Sonic Motor for quick and quiet autofocusing, which is complemented by an optimized AF algorithm to produce smoother focusing performance. The HSM allows for full-time manual focus over ride and control by rotating the focus ring at any time.
The lens is built using a Thermally Stable Composite material, along with traditional metals, for greater precision when you are using it in wide temperature variations. It is also rubber sealed in the mount, so it is dust- and splash-resistant.
Accessories supplied with the lens

• Front lens cap
• Rear lens cap
• Lens Hood
• Soft padded case

Focal Length: 135 mm Maximum Aperture: f/1.8 Minimum Aperture: f/16 Focus Adjustment: HSM autofocus, manual override Closest Focusing Distance: 2.87' Filter Size: 82mm Max. Aperture Blades: 9, rounded