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
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
