Sony Patent for FE 50mm f/1.8 Lens for Full Frame Mirrorless Cameras

Sony has filed a patent for a new bright portrait lens in Japan. The new patent describes the Sony FE 50mm f/1.8 lens designed for mirrorless cameras with full-frame image sensors.

Along with the FE 50mm f/1.8 prime lens, pending patent also include the Sonnar FE 55 mm F1.8 ZA lens.

This would be good news for the current Sony A7-series FE-mount users. On the other hand we have to underline that it may take a long time for this lens come into production.

Sony FE 50mm f/1.8 Lens Patent Details

sony-fe-50mm-f1-8-lens-patent

Explanation self interpretation of patent literature

  • Patent Publication No. 2015-68910
    • Published 2015.4.13
    • Filing date 2013.9.27
  • Example
    embodiment
    Example Fno. Focal distance Half angle Lens constitution
    One 1.86 53.61 22.15 5 groups seven
    Two 52.18 1.85 22.81 6 eight group
    Three 55.01 1.85 21.53 6 eight group
    Four 53.3984 1.86 22.3275 5 groups nine
    Five 53.45 1.8 22.42 6 10 sheets group
    Six 46.35 1.85 25.29 7 10 sheets group
    Seven 46.19 1.85 25.19 8 groups 10 sheets
    Eight 53.61 1.88 21.84 6 groups nine
    Nine 53.54 1.88 21.92 6 groups nine
    Ten 53.32 1.8303 21.99 6 groups nine
    Eleven 47.00 1.87 24.98 7 10 sheets group

    Image height Y = 21.63mm

  • Sony patents
    • 3-group configuration of positive and negative positive
    • Inner focus (the second group)

via EG