Tamron Patent for 70-300mm f/4-6.3 Di III Lens

Egami has discovered a new patent filed by Tamron in Japan. The new patent describes the Tamron 70-300mm f/4-6.3 Di III lens for 1-inch-type mirrorless cameras.

The patent has the “Di III” designation, which means that it has been created for mirrorless cameras.

If becomes available to the market, Tamron’s patented super-telephoto zoom lens will offer a 35mm equivalent of 189-810mm. See the details below.

Tamron 70-300mm f/4-6.3 Di III Lens Patent

tamron-70-300mm-f4-6-3-di-iii-patent

Explanation self interpretation of patent literature

  • Patent Publication No. 2014-228721
    • Published 2014.12.8
    • Filing date 2013.5.23
  • Example 1
    • The focal length f = 10.31-41.50-100.60mm
    • Fno. 3.657-5.267-5.799
    • Half angle ω = 40.1947-10.9138- 4.5726 °
  • Example 2
    • The focal length f = 10.30-38.91-100.21mm
    • Fno. 3.6579- 5.0177- 5.8760
    • Half angle ω = 40.250- 11.571-4.601 °
  • Example 3
    • The focal length f = 72.10- 148.41- 291.00mm
    • Fno. 4.2519- 4.9044- 6.3077
    • Half angle ω = 6.488-3.162-1.614 °

via Egami