HD PENTAX-DA645 28-45mmF4.5ED AW SR: An ultra-wide-angle zoom lens engineered to elevate the optical execution of the PENTAX 645 Medium Format Digital Cameras
Denver, Colorado August 4, 2014 Today, RICOH IMAGING AMERICAS CORPORATION announces the addition of the HD PENTAX DA645 28-45mmF4.5ED AW SR to the 645 interchangeable lens series. This 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. Now Pentax 645 medium-format shooters will have a new high-quality lens to expand their distinct format shooting.
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.