New camera, new lens: this Pentax-D FA 645 55mm F2.8 AL[IF] SDM AW Lens is the first model of the Pentax-D FA 645 lens series created for the Pentax 645D digital medium-format camera. With a focal length that's equivalent to a 43.5mm standard lens (in 35mm), it features optics optimized for digital photography to assure exceptional performance, and also provides an image circle covering the image area of existing 645-format film SLR cameras. It has dependable, dust-proof, weather-resistant construction for active outdoor photography.
This lens features a Supersonic Direct-drive Motor (SDM) autofocus drive and Quick-Shift for instant autofocus/manual focus switching, Aero Bright coating to help prevent flare and ghost images, and it's Pentax's first 645 system lens to incorporate a rounded diaphragm for improved bokeh (the aesthetic quality of the blur in the out-of-focus areas of an image).
|Equivalent 35mm Focal Length||43.5mm|
|Angle of View @ Infinity||53 degree|
|Elements/Groups||9 elements/7 groups|
|f/Stop Range||F/2.8 to f/22|
|Flash Synchronization||Not specified by manufacturer|
|Minimum Focus Distance||1.64' (0.5 m)|
|Dimensions||81.3mm diameter x 68.2mm length (3.2 x 2.7")|
|Weight||14.7 oz (416 g)|