New 65 f/2.8 & 180 f/3.5 Macro Patents

New 65 f/2.8 & 180 f/3.5 Macro Patents

65 f/2.8 Macro

Patent Publication No. 2011-191743

  • 2011.9.29 Release Date
  • Filing date 2010.2.16

Example 8

  • Focal length f = 65.00mm
  • Fno 2.90 – 3.05 – 3.96
  • Half angle of 18.41 °
  • Image height 21.64
  • 145.08mm Length Lens
  • Back Focus 38.20 – 47.63 – 37.80mm
  • Positive and negative lens group of positive and negative 4
  • Inner Focus + Rear Focus
  • Group 2, Group 3, Group 4 to move the focus method

180 f/3.5 Macro / 150 f/2.8 Macro / 135 f/2.8 Macro

Patent Publication No. 2011-191743

  • 2011.9.29 Release Date
  • Filing date 2010.2.16

Example 1

  • Focal length f = 180.00mm
  • Fno 3.50 – 4.60 – 5.80
  • 6.85 ° half angle
  • Image height 21.64
  • 225.02mm Length Lens
  • Back Focus 64.01mm

Example 4

  • Focal length f = 150.00mm
  • Fno 2.80 – 4.00 – 5.00
  • 8.21 ° half angle
  • Image height 21.64
  • 206.53mm Length Lens
  • Back Focus 49.00mm

Example 5

  • Focal length f = 135.00mm
  • Fno 2.80 – 3.80 – 4.80
  • 9.20 ° half angle
  • Image height 21.64
  • 205.00mm Length Lens
  • Back Focus 46.50mm

Four groups of positive and negative lenses accurately

Inner Focus

The combination of convex and concave lens, low dispersion and high dispersion in the most object side lens, chromatic aberration correction

Source [EG]

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