PANASONIC LEICA DC VARIO-SUMMILUX 10.9-34mm f/1.7-2.8 ASPH. (Panasonic Lumix LX100 / LX100 II; Leica D-Lux (Typ 109) / D-Lux 7 / D-Lux 8)

US 2016/0054550 A1, Example 1 — Takakazu Bito, Hiroaki Suzuki

11 ELEMENTS / 8 GROUPS
MARKETED 10.9-34mm f/1.7-2.8
MODEL EFL 11.265-32.538 mm
DESIGN F/1.76551-2.91140
8 ASPHERICAL SURFACES

Focus Mechanism

Not modeled — G6 moves objectward for close focus; the patent provides only infinity-focus zoom spacings.

Optical Elements (11 physical)

ElementTypeGlass
L1Biconvex PositiveFCD515 (coordinate-compatible spectral proxy; supplier unconfirmed)
L2Biconcave Negative (2× Asph)S-LAH53 (coordinate-compatible spectral proxy; supplier unconfirmed)
L3Biconcave NegativeSF6 (coordinate-compatible spectral proxy; supplier unconfirmed)
L4Biconvex PositiveH-ZLaF4LA (coordinate-compatible spectral proxy; supplier unconfirmed)
L5Negative Meniscus (1× Asph)S-TIM28 (coordinate-compatible spectral proxy; supplier unconfirmed)
L6Biconcave Negative (1× Asph)M-BACD12 (coordinate-compatible spectral proxy; supplier unconfirmed)
L7Biconvex PositiveE-FDS2 (coordinate-compatible spectral proxy; supplier unconfirmed)
L8Biconvex Positive (2× Asph)M-FCD500 (coordinate-compatible spectral proxy; supplier unconfirmed)
L9Biconvex PositiveJ-LASF016 (coordinate-compatible spectral proxy; supplier unconfirmed)
L10Biconcave NegativeJ-SF03 (coordinate-compatible spectral proxy; supplier unconfirmed)
L11Positive Meniscus (2× Asph)M-FCD500 (coordinate-compatible spectral proxy; supplier unconfirmed)