Pentax D-FA 645 55mm f2.8 AL (IF) SDM AW Lens

 The D FA 645 55mm F2.8 lens is a fast, standard lens designed specifically for use with the PENTAX 645D. It features an advanced optical design tailored for digital photography, quiet SDM autofocus, and it's fully weather sealed for field use.

• Smooth, Quiet SDM Autofocus
• SP Coating Blocks Dust and Dirt
• Weather-Resistant and Dustproof
• Aero Bright Coating to Prevent Flare

New camera, new lens: this Pentax-D FA 645 55mm f/2.8 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).