Pentax has announced a new high-grade consumer zoom lens today, the Pentax DA 17-70mm f/4 [IF] SDM. Providing a new lens in the same class as Pentax’s popular constant-aperture 16-45mm f/4, the 17-70mm adds a 4x zoom range as well as Pentax’s quick and quiet Supersonic Motor Drive (SDM) lens-based focusing motor.

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