Second mirrorless APS-C lens patent from Pentax: 18-70mm f/3.5-7.1
In addition to the 18-55mm f/3.5-6.7 lens from last week, Pentax filed another patent in Japan for a 18-70mm f/3.5-7.1 mirrorless APS-C lens:
- Patent 2012-108333
- Patent release date: June 7, 2012
- Patent filing date: October 18, 2010
- Zoom ratio: 3.92x
- Aperture: 3.60 - 6.95
- Focal length: 18.071 - 70.840mm
- Half angle of view: 11.7 - 45.7deg
- Image height: 14.24mm
- Back focus: 2.17mm
- Lens length: 70.23 - 100.0mm
- Lens design: 6 groups, 3 aspherical elements