Pentax filed for a patent in Japan for a DA 12-35mm f/3.5-4.5 AL WR SDM lens:
- Patent number: 2010-282230
- Release date: December 16th, 2010
- Filing date: September 10th, 2010
- Focal length: 12.30-34.50mm
- Aperture: 3.6-4.5
- Angle of view: 101.2-44.0°
- 3 aspherical elements
- Suited for APS-C format cameras