Pentax SMCP-FA 20-35mm f/4 AL Super Wide Angle Auto Focus Zoom Lens

The Pentax SMCP-FA 20-35mm f4.0 AL lens has a fully automatic diaphragm and uses a TTL open-aperture metering system. At just under three inches and only 8.6 ounces, this lens is easy to take with you everywhere

Specifications
Construction 8 Groups/ 10 Elements
Angle of view 94° - 64°
F stop range f/4-22
Closest Focusing Distance 1.0 ft. (0.3m)
Maximum Magnification 1:6.25
Filter Size 58mm
Dimensions (Length x Diameter) 2.7" x 2.7" (68mm x 69.5mm)
Weight 8.6 oz. (245g)
Notes Diaphragm: Fully Automatic
Photometric Method: TTL open-aperture metering