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. The lens is compatible with the Mamiya 645AFD III, 645AFD II and ZD cameras. With the ZD back the equivalent 35mm focal length is 32-64mm.
|Optical Construction||13 groups, 10 elements|
|Angle of View||72-46 degrees|
|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 35mm Focal Length||28-56mm|
|Lens Hood||Bayonet Floral, Supplied|
|Dimensions (L x W)||4.3 x 3.4 inches (110 x 86mm)|
|Weight||2 lb. (910g)|