With an F3.5 aperture throughout the entire zoom range, the 10-20mm F3.5 is perfect for low light photography. Sigma wide angle lenses accentuate the relationship of subjects within a photo and thus become an important creative tool for photographers. Designed for APS-C DSLRs, this fast fixed aperture lens makes photography easier for the photographer who wishes to precisely control their depth of field and also for working with non TTL Flash systems. Super Multi-layer coating reduces flare and ghosting, four aspherical lenses provide correction for distortion and an inner focusing system eliminates front lens rotation, making it suitable for use of polarizing filters. Perfect for shooting landscape photography, architecture photography, interior photography, photojournalism, wedding photography, group/event photography and more.

SPECIFICATIONS
Lens Construction	13 Elements in 10 Groups
Angle of View	102.4° - 63.8°
Number of Diaphragm Blades	7
Minimum Aperture	f22
Minimum Focusing Distance	24 cm / 9.4 in
Filter Size (mm)	82
Maximum Magnifications	01:06.6
Dimensions	87.3 x 88.2 mm/3.4 x 3.5 in
(Diameter x Length)
Weight	520g / 18.3oz.
Corresponding Mounts	Sigma	HSM
		EX
		DC
	Nikon	HSM
		EX
		DC
	Canon	HSM
		EX
		DC