SIGMA EX AF 15-30mm F3.5-4.5 DG for Pentax DIGITAL and Film SLR

Super Multi Coating reduces flare and ghosting that tends to occur when using digital SLR cameras.

It covers from 15mm ultra-wide angle to 30mm wide-angle.

Sigma provides the new ultra-wide angle zoom lens from 15mm and this lens is the first of its kind in the world. It can be useful for images of landscapes, large buildings, group photographs or even more. The perspective that changes with the angle-of-view gives picture an extraordinary feeling.

Minimum focus distance with 30cm (11.8 in.) at all focal length

Delicate compositions can be adjusted by lens zooming and this is helpful for close-up photography. Provides deep depth of field with its short focal length for amazing photographic expressions.
Desirable for digital SLR cameras

This is an ultra-wide zoom lens that covers a large wide-angle range from 15 mm to 30 mm. With a minimum focusing distance of 30 cm (11.8 inches) throughout the entire zoom range, it is an ideal lens for Digital SLR Cameras.
Aspherical lens for distortion correction

It incorporates hybrid aspherical lens in the front lens group to minimize distortion and astigmatism, and molded glass aspherical lens in the rear lens group to minimize spherical aberration. Minimization of the distortion is a most important issue for zoom lens, but Sigma has succeeded, to provide image quality with minimal distortion by employing aspherical lenses.
Inner focus system

This lens incorporates an internal focusing system, which eliminates front lens rotation. Since focusing does not change its overall length, this lens is easy to hold and use. Also it is allowing the use of a Petal-type Hood.
Handling

The lens also incorporates Dual-Focus (DF) mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens.


Lens Construction


17 Elements in 13 Groups
Angle of View 110.5 - 71.6 degrees
Number of Diaphragm Blades 8 Blades
Minimum Aperture F22
Minimum Focusing Distance 30cm / 11.8 in.
Maximum Magnification 1:6
Filter Size Rear Type (Gelatin Filter)
Dimensions Diameter 87mm X Length 132.5mm 3.4 in. x 5.1 in.
Weight 615g / 21.8 oz.
Corresponding AF Mounts Pentax

15-30mm F3.5-4.5 EX DG ASPHERICAL

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