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Amazing Visual Accuracy Advanced correcting techniques for optical distortion create visually accurate shots with minimum aberration -- so foreground and background are both represented as actually seen.

Clear, Sharp Imaging With sophisticated optical coating to prevent internal reflection, this wide-angle lens achieves superb clarity and definition.

Deep Depth of Field The ability to keep both close foreground and distant background in critically sharp focus.

Rear Focusing System Lens elements at the rear of the lens move to increase auto-focus speed and help you catch quick action.

Circular Aperture Conventional lenses close their apertures with blades that can create multi-sided shapes -- but the aperture blades of this superb wide-angle lens form a near circle at the wide openings you’ll use for low-light shots, so spot-light sources have a pleasing circular defocused effect.

Focal Length- APS: 30mm (35mm Equivalent: 20mm)
Filter Diameter- 72mm
Minimum Focus Distance- 9.6” (25cm)
Magnification- x 0.13
Lens Groups/Elements- 9 groups, 10 elements
Distance Scale- Yes
Depth-of-Field- Yes
Aperture (Max.)- f/2.8
Aperture (Min.)- f/22
Blades- 7 aperture blades
Aspheric Elements- no aspheric
Lens Type- Wide Angle & Wide Angle Zoom

Front and rear lens cap SH0013 petal lens hood