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Tamron 300mm F2.8 Lens Patent for Full-Frame Mirrorless Camera

New Tamron patent surfaced over the web, the Tamron 300mm F2.8 Lens designed for full frame Mirrorless camera, we know that currently no Full Frame mirrorless available/announced in the market, according to sources Tamron is close to Sony and Canon and we may see a Full-Frame mirrorless NEX OR FF EOS- M very Soon.

Self-interpretation and summary, Patent Documents

  • Patent Publication No. 2012-242504
    • Release Date 2012.12.10
    • Filing date 2011.5.17
    • Related 2012-242505
  • Example 1
    • Focal length f = 294.00mm
    • Fno. = 2.88
    • 2ω = 9.3 ° angle of view
    • 19 sheets 16 groups lens configuration
    • Three 3 aspherical surface
    • (Abbe number 81.6) three low-dispersion glass
    • (Abbe number 70.4) one low-dispersion glassTamron LD glass is standard, I did not know that more than 80 or more than 70 such
  • Positive and negative polarity
  • Inner Focus (the third group for focusing)
  • (Adjusted for the fourth group in the group of anti-vibration) shake
  • Costs in the form of inexpensive glass in one of the first lens group
  • One costs the consists of the second lens group



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