Pentax SMC P-FA 20-35mm f/4.0 AL

Manufacturer's Description:

"The smc P-FA Zoom 20mm-35mm f/4 AL compact zoom lens covers angles of view from an ultra-wide 94° at the 20mm setting to a wide 63° at 35mm. It incorporates two aspherical lens elements to reduce distortion and produce sharp, crisp image reproduction. Like all PENTAX-FA lenses, it is treated with PENTAX's acclaimed smc coating for maximum light transmission, sharp definition, and high contrast, while minimizing flare and ghost imaging. Extremely flexible, this lens is ideal for shooting panoramic landscapes and tall buildings."