Patent News: Tamron 35mm F1.4 Lens

Patent News: Tamron 35mm F1.4 Lens patent surfaced over the web, take a look at the details below.

Description and self-interpretation of the patent literature

• Patent Publication No. 2013-83783
  • Publication date 2013.5.9
  • Filing date 2011.10.7

• Example

  	Focal length	Fno.	MOD	Lens constitution
  One	35.25	1.80	400.000	8 group nine
  Two	32.17	1.80	600.000	8 group nine
  Three	33.651	1.818	600.000	10 sheets in 9 groups
  Four	35.62	1.34	400.000	10 sheets in 9 groups
  Five	36.74	1.49	400.000	10 sheets in 9 groups

  Maximum image height 14.20mm

• Gauss type
  • Bright
  • For feeding whole, AF is unfavorable
  • Sagittal aberration occurs
• Tamron patents
  • The object side of the diaphragm, and place the meniscus lens having a concave surface facing the object side
    • and a lens configuration of the triplet considerably around the aperture
    • Sagittal aberration correction
  • Place a negative lens having a concave surface facing the image side
  • Angle of view of the standard lens equivalent
  • Large-diameter
  • Inner focus

source-egami