The Tamron 28-300mm XR Di lens replaces the popular XR LD Ultra Zoom version, and has now been improved to include Tamron's "Di" design. Digitally integrated design is the designation that Tamron uses for lenses that feature the improved optical design that meets the performance characteristics of digital SLR cameras, as well as film cameras. When used with APS-C size (standard) digital SLR cameras, the lens provides an angle of view equivalent to approximately 43-465mm, covering the standard-to-ultra-telephoto range with no sacrifice of quality or aperture range.

For Pentax DSLRs with APS-C Size Sensors 4 Stops of Anti-Shake (OS) Compensation Aperture of f/2.8 throughout Zoom Range Accepts 77mm Filters Ultra Compact (Only 3.6", 91.8mm Long) Multi-Layered Lens Coating Excellent Correction for Aberrations Hyper-Sonic Motor for Quiet/Fast AF Close Focusing Distance of 11" (28cm) Weighs Only 19.9 oz (565 g)

The Pentax smc P-DA 14mm F2.8 ED (IF) is designed to be used with digital SLR cameras. It incorporates a high-refraction extra low dispersion (ED) glass element to produce a high-resolution, high-contrast image with true-to-life color rendition, and features an Internal Focus system to make focusing smoother and faster.

The Pentax 55mm f/1.4 DA* SDM Autofocus Lens is a compact and bright short-telephoto lens of the highest order, made exclusively for Pentax digital SLR cameras. In a stocky housing ready for harsh conditions, you'll get a bright f/1.4 aperture-worlds away from the experience you're used to with more common zooms-that opens up new creative doors to you as a photographer.

The Sigma 4.5mm f/2.8 EX DC HSM Lens is a spherical fisheye lens that easily captures a full 180° view in all directions, in a circular image. Even the most familiar and mundane of subjects can be portrayed with startlingly fresh new expressions through exaggerated perspectives and unusual distortion effects. It is well suited for academic and technical measurements such as solid angle measurements, cloud cover measurements & virtual reality.

The super wide-angle 122 to 84.1 degrees zoom range of this lens makes it ideal for the tightest of interiors, as well as for dramatic landscape photography. Using effective arangment of lens elements and advanced technology this lens has super compact dimensions of only 3.9 inches full-length, and 3.4 inches maximum diameter. It is equipped with an Inner Focusing system that will keep the length of the lens unchanged while controlling aberration.

The Sigma 24-70mm f/2.8 IF EX DG HSM Lens is a large aperture standard zoom lens that's ideal for photojournalism and general professional photography. It provides (in 35mm terms) the equivalent of a 38-112mm f/2.8 lens upon current Pentax digital SLR cameras. The lens provides a bright viewfinder, speedy AF, and full-time manual focus override at any time without having to change the focusing switch position.

Wide-Angle 12-24 mm Zoom Lens For Full-Frame/35 mm Cameras Compatible with APS-C Cameras Focuses to 11" One Special Low Dispersion Element Four Low Dispersion FLD Elements Multi-Layer Coating Reduces Flare Splash-Proof Design

When you need a medium-telephoto standard lens for everything from portraiture to sports, the fast Sigma 85mm f/1.4 EX DG HSM Lens for Pentax Digital SLRs is a great solution. This large aperture beauty is designed with an SLD (Special Low Dispersion) glass element and a glass mold element which yield first-class, sharp image captures with high contrast.

This Sigma 150-500mm f/5-6.3 DG OS HSM APO Lens is for digital SLR cameras with a Pentax K lens mount. It is an ultra telephoto zoom lens ideal for nature, wildlife, or sports photography. This zoom range translates into an equivalent range of 225-750mm when used with digital SLR cameras with an APS size chip. The lens is also compatible with full frame cameras. The OS (Optical Stabilizer) system minimizes image blur caused by camera shake, and offers the equivalent of shooting at a shutter speed 3-4 stops faster. This allows handheld telephoto zoom shooting even in poorly lit conditions.

The Sigma 50-150mm f/2.8 II EX DC HSM lens is a compact, lightweight, large aperture telephoto zoom lens designed exclusively for digital SLR cameras. The version II of this high-quality lens has been optimized with an even better optical design, which provides optimum lens performance providing excellent correction for flare, ghosting and all types of aberrations.

Macro Lens With 1:1 Magnification Focuses to 15" Optical Image Stabilization Hyper-Sonic Motor for Fast, Quiet AF 3 SLD Elements Correct Aberrations Splash-Proof Construction Protects Lens For Pentax SLR Cameras

Finally available as a serious zoom telephoto for sports, wildlife, and other applications, the Pentax DA* 60-250mm f/4 ED (IF) SDM Autofocus Lens truly adds an important element to the collection of lenses for the Pentax system. They've had some little jewels which any brand would covet, but in the telephoto department they've not had a 'big gun' since the film days. Now they do; the DA* 60-250 will give you professional results for many of life's sporting, action, and wildlife opportunities.

Up to 4 Stops of Optical Stabilization Optimized for Pentax Full-Frame DSLRs Auto and Manual Focus Super Multi-Layer Lens Coating Fast f/2.8 Maximum Aperture Fast & Quiet Hyper-Sonic Motor (HSM) 77mm Filter Size Excellent for Action/Low-Light Shooting 55.1" (140cm) Close Focusing Distance Lens Hood & Adapter Included

For Pentax AF DSLR Cameras HSM (Hyper Sonic Motor) for Smooth AF Optical Image Stabilization (OS) Designed for Full-Frame DSLR Cameras 1 SLD Element & 2 FLD Elements Inner Focusing System Splash-Proof Construction 105mm Filter Size Only 11.4" (29cm) Long Weighs Only 6.5 lb (2.9 kg)

The Sigma APO 300mm f/2.8 EX DG lens is an ultra compact Apochromatic telephoto lens with a fast f/2.8 maximum aperture which incorporates two Extraordinary Low Dispersion glass elements to reduce chromatic aberration to a minimum. It incorporates internal focusing which enables responsive and fast autofocus speed. A detachable tripod socket and rotatable drop in filter holder are also included.