HD Pentax-DA645 28-45mm F4.5ED AW SR Overview

Announced Aug 4, 2014 •
Prime lens | Pentax 645AF2 | 26390
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Pentax DA 645 28-45mm f/4.5 ED AW SR - Objetivo (Ultra-Wide, SLR, 17/12, 1.1-1.77" (28-45 mm), Pentax K, 0.866-1.4" (22-35.5 mm))
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Product description
Announced Aug 4, 2014
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Manufacturer description: The HD PENTAX DA645 28-45mm F4.5ED AW SR is an ultra-wide-angle zoom lens is the latest in the PENTAX 645 line-up and is engineered for use with PENTAX medium-format, digital SLR cameras. This new lens provides focal lengths from 22mm to 35.5mm in the 35mm format, and is the first ultra-wide-angle zoom lens (approximately 1.6X zoom ratio) designed for use with our medium-format digital cameras. Its optics consists of 17 elements in 12 groups, including two high-performance aspherical elements and two extra-low dispersion elements. In addition, the PENTAX-innovated SR (Shake Reduction) mechanism has been incorporated into this exceptional lens, which effectively compensates for camera shake up to approximately 3.5 shutter stops.

Quick specs
Lens type Prime lens
Focal length 28–45 mm
Image stab. Yes (3.5 stops)
Lens mount Pentax 645AF2
Max aperture F4.5
Min aperture F32
Min focus 0.40 m (15.75)
Max magnification 0.21×
Weight 1470 g (3.24 lb)
Length 152 mm (5.98)

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