OLYMPUS M.ZUIKO DIGITAL ED 12-200mm f/3.5-6.3

JP 2020-154139 A, Numerical Example 1 — Masahiro Imamura, Toyonori Kon

16 ELEMENTS / 11 GROUPS
DESIGN f = 12.36-196.04 mm
DESIGN F/3.60-6.47
4 ASPHERICAL SURFACES / 3 ELEMENTS
INFINITY FOCUS ONLY

Focus Mechanism

Infinity focus only. The patent tabulates infinity states only and identifies G4, the cemented negative doublet, as the focusing group (¶0081); no G4 focus travel is printed, so none is modelled and the focus control stays at infinity. The 0.22 m figure is the maker's wide-end minimum focus distance (0.70 m at the tele end), kept as metadata, not a modelled conjugate.

Optical Elements (16 physical)

ElementTypeGlass
L1Negative MeniscusJ-LASFH17 (HIKARI catalog equivalent; production supplier unspecified)
L2Positive MeniscusS-FPL53 (OHARA catalog equivalent; production supplier unspecified)
L3Positive MeniscusFCD515 (HOYA catalog equivalent; production supplier unspecified)
L4Negative MeniscusS-LAH58 (OHARA catalog equivalent; production supplier unspecified)
L5Biconcave Negative (Aspherical)Unmatched (1.80280, 40.55)
L6Biconvex PositiveS-NPH1 (OHARA catalog equivalent; production supplier unspecified)
L7Biconcave NegativeS-LAH58 (OHARA catalog equivalent; production supplier unspecified)
L8Biconvex PositivePBH21 (OHARA catalog equivalent; production supplier unspecified)
L9Biconvex Positive (Double Aspherical)Unmatched (1.76960, 49.30)
L10Negative MeniscusTAFD35 (HOYA catalog equivalent; production supplier unspecified)
L11Biconvex PositiveS-FPL53 (OHARA catalog equivalent; production supplier unspecified)
L12Positive MeniscusS-BSL7 (OHARA catalog equivalent; production supplier unspecified)
L13Negative MeniscusS-LAH55V (OHARA catalog equivalent; production supplier unspecified)
L14Positive MeniscusS-TIM28 (OHARA catalog equivalent; production supplier unspecified)
L15Negative Meniscus (Aspherical)Unmatched (1.80280, 40.55)
L16Biconvex PositiveS-NSL36 (OHARA catalog equivalent; production supplier unspecified)