Third mirrorless APS-C lens patent from Pentax: 16-55mm f/3.5-5.6

After the 18-70mm f/3.5-7.1 and 18-55mm f/3.5-6.7 lens patents, Pentax filed another patent in Japan for a 16-55mm f/3.5-5.6 APS-C mirrorless lens:

  • Patent: 2012-118431
  • Release date: June 21, 2012
  • Filing date: December 3, 2012
  • Zoom ratio: 3.30
  • Aperture: 3.6 - 5.8
  • Focal length: 16.22 - 53.51mm
  • Image height: 14.20mm
  • Back focus: 4.181mm
  • Lens length: 72.49 - 86.00mm
  • Lens design: 9 lens elements in 8 groups,
  • Internal focus
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