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|
|Lens type||Prime lens|
|Aperture Range||Maximum: f/2.8
|Lens mount||Pentax 645, KAF2, 645AF2|
|Minimum Focusing Distance||1.36' / 3.45 m|
|Angle Of View||34 to 42.5°|
|Filter Size||Front: 67 mm|
|Motor Type||Screw Drive from camera|
|Macro Reproduction Ratio||0.5x|
|Dimensions (DxL)||Approx. 3.56 x 4.39“ (9 x 11 cm)|
|Optical Design||11 Elements in 9 Groups|