LEICA SUPER-VARIO-ELMAR-SL 16-35mm f/3.5-4.5 ASPH.

JP 2018-087903 A — Yoshihito Souma

18 ELEMENTS / 12 GROUPS
16-35mm marketed; 16.399-34.194mm computed design EFL
f/3.5-4.5 marketed; f/3.55-4.60 modeled
4 ASPHERICAL SURFACES / 2 ELEMENTS
0.35 m PUBLISHED MODEL FOCUS ENDPOINT; 0.25 m MARKETED MFD

Focus Mechanism

PUBLISHED: Gr2a (cemented L6+L7, surfaces 10-12) translates imageward to the patent's nominal 0.35 m state. The marketed 0.25 m MFD is metadata only; no internal 0.25 m reconstruction is authored.

Optical Elements (18 physical)

ElementTypeGlass
L1Negative MeniscusTAFD5G (HOYA catalog equivalent; supplier unspecified)
L2Neg. Meniscus (2× Asph)L-BAL42 (OHARA catalog equivalent; supplier unspecified)
L3Biconvex PositiveE-FD2 (HOYA catalog equivalent; supplier unspecified)
L4Biconcave NegativeTAC8 (HOYA catalog equivalent; supplier unspecified)
L5Positive MeniscusE-FD13 (HOYA catalog equivalent; supplier unspecified)
L6Positive MeniscusFC5 (HOYA catalog equivalent; supplier unspecified)
L7Negative MeniscusN-LAF34 (SCHOTT catalog equivalent of the HOYA TAF1 coordinate; supplier unspecified)
L8Biconvex PositiveFC5 (HOYA catalog equivalent; supplier unspecified)
L9Positive MeniscusFD140 (HOYA catalog equivalent; supplier unspecified)
L10Negative MeniscusTAFD35 (HOYA catalog equivalent; supplier unspecified)
L11Biconvex Positive (2× Asph)L-BAL42 (OHARA catalog equivalent; supplier unspecified)
L12Biconvex PositiveFC5 (HOYA catalog equivalent; supplier unspecified)
L13Negative MeniscusTAFD35 (HOYA catalog equivalent; supplier unspecified)
L14Biconcave NegativeTAFD35 (HOYA catalog equivalent; supplier unspecified)
L15Biconvex PositiveN-BK7 (SCHOTT catalog equivalent of the HOYA BSC7 coordinate; supplier unspecified)
L16Positive MeniscusE-FDS1 (HOYA catalog equivalent; supplier unspecified)
L17Negative MeniscusTAFD35 (HOYA catalog equivalent; supplier unspecified)
L18Plano-Concave NegativeTAFD35 (HOYA catalog equivalent; supplier unspecified)