Tamron 35mm F/1.4 APS-C Mirrorless Lens Patent

Egami the Japanese Photography Blog found a patent filed by Tamron for APS-C mirrorless cameras. The patent details the Tamron 35mm F/1.4 APS-C mirrorless lens.

There is not much information about which system the 35mm f/1.4 will be released. Tamron only made one lens 18-200mm Di III VC for Sony NEX cameras which is currently on sale at Amazon.

Below are the information translated by Google for the Tamron 35mm F/1.4 APS-C mirrorless lens.

tamron-35mm-mirrorless-lens

Tamron 35mm F/1.4 APS-C Mirrorless Lens Patent

  • 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