Olympus Patent for 12-50mm f/2.8-4 MFT Lens

Egami has discovered a new patent filed by Olympus in Japan. The new patent describes the Olympus 12-50mm f/2.8-4 lens for Micro Four Thirds system mirrorless cameras.

The patented Olympus lens is a faster version for the current 12-50mm f/3.5‑6.3 lens with a much more attractive f/2.8-4.0 aperture. The Olympus 12-50mm f/2.8-4 lens provides 24-100mm equivalent focal length in 35mm format and becomes a useful standart zoom lens for MFT cameras.

If this patent becomes available then the Olympus 12-50mm f/2.8-4 lens will most likely replace the current 12-50mm version. See the patent details below.

Olympus Patent for 12-50mm f/2.8-4 MFT Lens

The current Olympus 12-50mm f/3.5‑6.3 lens

Description and self-interpretation of the patent literature

• Patent Publication No. 2014-106243
  • Publication date 2014.6.9
  • Filing date 2012.11.22
• Example 4
  • Focal length f = 12.24-21.83-39.20mm
  • Fno. 2.88
  • Angle of view 2ω = 88.78-53.15-30.05 °
  • Image height Y = 10.820mm
  • BF 16.899mm
  • 105.920-106.468-129.386mm total length
• Example 7
  • Focal length f = 12.24-24.30-49.20mm
  • Fno. 2.88-3.43-4.08
  • Angle of view 2ω = 87.51-47.00-24.10 °
  • Image height Y = 10.820mm
  • BF 14.234mm
  • 107.672-120.646-152.973mm total length
• Olympus patents
  • 5-group zoom of positive and negative positive positive and negative
  • Inner focus
  • MOD 0.25m

via Egami