SONY ZEISS VARIO-SONNAR T* 8.8-73.3mm f/2.8 (Sony Cyber-shot DSC-RX10 / DSC-RX10 II)

US 2014/0354857 A1 — Takuya Kato, Atsushi Oohata, Hiroki Hagiwara

14 ELEMENTS / 11 GROUPS
f = 9.19-64.68 mm (DESIGN)
F/2.91 (DESIGN)
2ω = 81.98°-12.93°
13 ASPHERICAL SURFACES / 7 ELEMENTS

Focus Mechanism

Inner focus: the fourth group, the single biconcave element L12, translates along the axis; all other groups are stationary during focus. The patent publishes no close-focus spacing states, so no internal focus travel is modelled.

Optical Elements (14 physical)

ElementTypeGlass
L1Negative MeniscusFDS90 — coordinate-compatible spectral proxy; production supplier unconfirmed
L2Positive MeniscusFCD1 — coordinate-compatible spectral proxy; production supplier unconfirmed
L3Positive MeniscusJ-PSKH4 — coordinate-compatible spectral proxy; production supplier unconfirmed
L4Neg. Meniscus (2x Asph)803456 - high-index lanthanum class (catalog unresolved)
L5Biconcave NegativeS-LAL18 — coordinate-compatible spectral proxy; production supplier unconfirmed
L6Biconvex PositiveTAFD40 — coordinate-compatible spectral proxy; production supplier unconfirmed
L7Neg. Meniscus (2x Asph)NBFD10 — coordinate-compatible spectral proxy; production supplier unconfirmed
L8Biconvex Pos. (2x Asph)M-PCD51 — coordinate-compatible spectral proxy; production supplier unconfirmed
L9Biconvex PositiveFC5 — coordinate-compatible spectral proxy; production supplier unconfirmed
L10Biconcave NegativeNBFD15 — coordinate-compatible spectral proxy; production supplier unconfirmed
L11Biconvex Pos. (2x Asph)S-BAL35 — coordinate-compatible spectral proxy; production supplier unconfirmed
L12Biconcave Neg. (2x Asph)M-TAF101 — coordinate-compatible spectral proxy; production supplier unconfirmed; nd follows the documented patent correction
L13Biconvex Pos. (2x Asph)M-PCD51 — coordinate-compatible spectral proxy; production supplier unconfirmed
L14Biconcave Neg. (1x Asph)M-PCD4 — coordinate-compatible spectral proxy; production supplier unconfirmed