Pentax 18-55mm f/3.5-6.7 mirrorless APS-C lens patent
Pentax filed a patent 2012-10830 in Japan for a 18-55mm f/3.5-6.7 lens (28-80mm equivalent) for APS-C mirrorless camera (like the K-01 or maybe for a new mirrorless model):
- Patent release date: June 7, 2012
- Patent filing date: October 17, 2010
- Zoom ratio: 2.85x
- Aperture: 3.6 - 6.7
- Focal length: 18.60 - 53.00mm
- Image height: 14.24mm
- Back Focus: 3.00mm
- 8 lens elements in 7 groups, 1 ED glass element, three aspherical elements