Wednesday, March 19, 2008
Mamiya Introduces Two New Digital Lenses for Mamiya Medium Format Cameras
Mamiya Sekor Zoom AF 45-90mm F4.5 D Aspherical
This newest zoom lens in the Mamiya Sekor Digital Lens Series is a wide angle to normal lens that utilizes the latest aspheric lens technology and low dispersion glass to produce high resolution and large image circle coverage for film and digital backs. By incorporating an aspherical lens element and specialized glass, compact dimensions, excellent color accuracy, outstanding edge sharpness and high resolving power is achieved.
Since wide angle lenses can cause color shift problems with digital backs (due to the extreme angle at which light rays hit the sensor), the Mamiya Sekor Zoom AF 45-90mm F4.5 D Aspherical has been designed to direct light onto the digital sensor at an angle that is ideal for digital photography.
With an angle of view of 42-76 degrees, the 45-90mm is equivalent to a 28-56mm lens in the 35mm format. Autofocus and manual focus functions are easily selected with one-touch action; simply move the focusing ring backwards or forwards. The floral hood can be used on the entire zoom range to effectively block unwanted light. In addition, the minimum focusing distance of 19 inches and its effective zoom range make it versatile enough to be considered a multi-purpose lens capable of architecture, landscape or snapshots.
Lens Construction: 13 groups, 10 elements
Angle of View: 72-46 degrees
Minimum Aperture: f/4.5 ~ 32
Minimum Focusing Distance: 19 inches (50cm)
Maximum Magnification Ratio: 0.12-0.24
Area Covered: 340 x 459mm at 45mm
110 x 86mm at 90mm
Equivalent Focusing Length for 35mm format: 28-56mm
Filter Diameter: 77mm
Lens Hood Type: Bayonet Floral shaped Hood
Dimensions (Length x Diameter): 4.3 x 3.4 inches (110 x 86mm)
Weight: 2 lb. (910g)
Equivalent Focal Length with ZD Back: 52-105mm for 645 format
32-65mm for 35mm format
CPU: 16 bit (rewritable)
Compatible Cameras: Mamiya 645AFD II, 645AFD III & ZD
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