Nikon filed a patent for 135mm F1.8 Lens, more details below
Self-interpretation and summary, Patent Document (translated by google)
- Patent Publication No. 2010-48125
- 2012.3.8 Release Date
- 2010.8.30 filing date
- Example 1
- F = 132.9mm focal length
- Fno = 1.8
- 18.3deg angle.
- Image height 21.6mm
- Length 162.5mm lens
- BF 42.2mm
- 15 sheets of 9 group lens configuration
- 2 ED glass sheet
- Nikon’s patent
- Group 3 consists of positive and negative positive
- Inner focus
- The second group for focusing
- Camera shake correction
- For anti-vibration part of the third group
- The fluctuation of aberration when anti-vibration hold
src – egami
