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Pentax SMC DA 645 28-45mm f/4.5 ED AW SR for Medium Format
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Pentax SMC DA 645 28-45mm f/4.5 ED AW SR for Medium Format

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The Pentax SMC DA 645 28-45mm f/4.5 ED AW SR for Medium Format is a wide-angle zoom lens designed for the Pentax 645D and 645Z.

  • Great for sweeping landscapes and large group shots

  • 1.3-foot minimum focusing distance

  • Fast, accurate autofocus with full-time manual focus

  • 3.5-stop image-stabilization system

Wide Focal Length. With a focal range equivalent to 22-35.5mm after sensor-crop factor, the 28-45mm f/4.5 is great for wide, sweeping landscapes, large group shots, or any other type of photography for which you’d desire an ultra-wide angle zoom range. Its 1.3-foot minimum focusing distance gives you the ability to capture false-perspective shots.

DC Autofocus Motor and Quick-Shift Focus System. The DC motor provides fast and accurate performance. Pentax’s Quick-Shift autofocus system allows you to quickly shift from auto to manual focus for on-the-fly accuracy.

In-Lens Stabilizer. The 28-45mm f/4.5 is Pentax’s first optically stabilized zoom lens, providing up to 3.5 stops of correction.

High-Quality Build. The fully weather-sealed lens construction works with the 645D or 645Z’s weather-sealed body for maximum reliability in the field. Internal focusing and zoom further help prevent debris from penetrating the lens. Additionally, the SP lens coating protects the front element from dust and oils and makes it easier to clean.

Focal Length 28 - 45 mm
Aperture Maximum: f/4.5
Minimum: f/32
Camera Mount Pentax 645
Angle of View @ Infinity 89° - 63°
Minimum Focus Distance 1.31' (.4 m)
Diaphragm Blades 9
Elements/Groups 17/12
Magnification 0.21x
DOF Scale No
Distance Scale Yes
Autofocus Yes
Tripod Collar No
Movements None
Filter Thread Front: 82 mm
Weight 3.24 lb (1.47 kg)
Dimensions Approx. 3.90 x 5.96" (99 x 151.5 mm)

82mm Front Lens Cap

Filter - Protective B+W XS-Pro Clear 82mm

Hood - Pentax PH-RBC82 for Medium Format

Pentax Rear Lens Cap