Sigma 70-200mm F2.8 EX DG HSM Pentax Mount.

Sigma 70-200mm F2.8 EX DG HSM Pentax Mount

Fast maximum aperture F2.8 telephoto lens optimized for digital SLR cameras.

This telephoto zoom lens has a large maximum aperture of f2.8 which remains constant throughout the zoom range and it is optimized for digital SLR cameras.

Two pieces of SLD (the special low dispersion) glass in the front lens group and another two in the rear group offer excellent correction of chromatic aberration. High optical performance is demonstrated throughout the entire zoom range.

New coating reduces Ghost and Flare.

The new multi layer lens coating and lens design reduce flare and ghost, which is a common problem with digital cameras and also creates an optimum color balance through the entire zoom range.

SLD glass for excellent image quality

Color aberration in the secondary spectrum is compensated by using two pieces of SLD (the special low dispersion) glass in the front lens group and another two in the rear group. This lens has excellent exhibits superior image quality.

Silent high-speed AF with HSM

The Hyper Sonic Motor (HSM) ensures a silent, high-speed AF function as well as full-time manual focusing capability for Sigma, Canon, and Nikon-D mount lenses.

Inner focusing and inner zooming systems

An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the petal-type lens hood supplied and circular polarizing filters. Since focusing and zooming do not change its overall length, ease of handling and operation is assured. A rotating tripod mount can be conveniently detached if required.

APO Tele-Converter EX (optional)

The Hyper Sonic Motor (HSM) ensures a silent, high-speed AF function as well as full-time manual focusing capability for Sigma, Canon, and Nikon mount lenses.
The lens can be used with the 1.4x EX or 2.0x EX Apo Tele Converters (optional), becoming a 98-280mmF4 Autofocus telephoto zoom lens or a 140-400mm F5.6 Autofocus telephoto zoom lens respectively.

Focal Length 70-200mm Minimum Aperture F22 Lens Construction 18 Elements in 15 Groups Angle of View 34.3 - 12.3 degrees Number of Diaphragm Blades 9 Blades Minimum Focusing Distance 100cm/39.4 in. Maximum Magnification 1:3.5 Filter Size 77mm Dimensions Diameter 86.6mm X Length 184.4mm 3.4 in. X 7.3 in. Weight 1,380g/48.7 oz.