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Nikon Lens Patent: 16-35mm F2.8 VR

16-35mm F2.8 Lens Patent

Nikon New Lens Patent surfaced over the web – 16-35mm F2.8 VR, Nikon already have 16-35mm F4 VR ED lens but the new lens will have F2.8 aperture throughout the zoom range, better IS and new anti-reflection film for superior performance under strong backlight condition.

Lens Patent Details

  • Patent Publication No. 2012-247687
    • Release Date 2012.12.13
    • Filing date 2011.5.30
  • Example 1
    • 24.00 – – 33.95mm f = 16.48 focal length
    • Fno. = 2.884
    • 84 – – 63 ° 2ω = 108 angle of view
    • Image height 21.64mm
    • 164.15 – – 161.56mm 170.00 overall optical length
    • 18 sheets 12 groups lens configuration
    • Four 5 aspherical surfaces
    • 3 ED glass sheets
  • Nikon patents
    • Inner Focus
    • Shake Reduction
      • By anti-vibration group and the rear group, and mitigate the effects of downsizing, eccentric aberration of the lens is given to
    • Anti-reflection film made of a multi-layer
      • Reduce flare, a ghost (n <= 1.3) and a small refractive index difference between the surface layer and the air
      • In one example, n = 1.26 refractive index in MgF2 + SiO2
      • Easy concave, convex surface subjected to the occurrence of the ghost

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