Nikon Patent 58mm F1.2 Lens

Nikkor old and costly Nikon 58mm f/1.2 (Noct-NIKKOR AI and AI-s) was announced on 1977 and discontinued in 1997, Now a new patent of 58mm F1.2 Lens appeared on the web (see patent details below), We hope that the upcoming lens will have AF and optimized for current generation of DSLRs.

Self-interpretation and summary, Patent Documents

• 2012-230133,2012-230340 Patent Publication No.
  • Release Date 2012.11.22
  • Filing date 2011.4.11
• Example 1
  • Focal length f = 58.0220mm
  • Fno. 1.210
  • Half angle of view ω = 20.81 °
  • Image height 21.6mm
  • 108.8935mm length
  • BF 38.0120mm
• Conventional Gaussian lens coma aberration correction, the aberration is insufficient Sajitarukoma
• The basic configuration is to be used for positive and negative positive negative Gaussian type and Kusenota
• After the group having a positive refractive power + + Throttle front lens group having a positive refractive power
• By placing one side by the front group and the rear lens group an aspherical surface, spherical aberration correction, Sajitarukoma aberration, the aberration Merijionarukoma
• Fed whole

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