The Pentax DFA M 90mm f/2.8 ED Lens for 645Z offers a 35mm equivalent focal length of approximately 71mm (or approximately 56mm when mounted on a PENTAX 645 film-format camera body). By incorporating two ED (extra-low dispersion) elements and one glass-moulded aspherical element in its optics, the lens assures high-resolution image reproduction over the entire image field, while effectively minimizing chromatic aberration – a problem commonly associated with fast lenses.
The FA 645 90mm lens offers macro photography at a maximum magnification of 0.5X. In close-up applications, its floating mechanism effectively compensates for the curvature of the field to assure sharp, well-defined images.
Focal Length | 90 mm |
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Lens type | Prime lens |
Aperture Range | Maximum: f/2.8 Minimum: f/22 |
Lens mount | Pentax 645, KAF2, 645AF2 |
Minimum Focusing Distance | 1.36' / 3.45 m |
Angle Of View | 34 to 42.5° |
Diaphragm Blades | 9 |
Filter Size | Front: 67 mm |
Autofocus | Yes |
Motor Type | Screw Drive from camera |
Macro Reproduction Ratio | 0.5x |
Weight | 1040 g |
Dimensions (DxL) | Approx. 3.56 x 4.39“ (9 x 11 cm) |
Magnification | 0.5x |
Optical Design | 11 Elements in 9 Groups |
Distance Scale | Yes |
DOF Scale | Yes |
Autofocus | Yes |