JP 2015-94867 A — Tsuyoshi Wakazono, Tomoyuki Nakamura, Kazuya Shimomura, Yu Inomoto
| 27 ELEMENTS / 22 GROUPS |
| 17-120mm PRODUCT / 17.0206-118.9429mm DESIGN |
| F2.8-3.4 DESIGN / T2.95-3.9 PRODUCT |
| 29.6mm PRODUCT IMAGE CIRCLE |
| 2 ASPHERICAL SURFACES |
Patent inner focus uses positive U12 (surfaces 7-8), moving imageward for nearer focus. Example 1 publishes only infinity-focus zoom spacings; production 0.85 m MOD is metadata only, so no internal close-focus motion is reconstructed.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus (1× Asph) | S-LAH66 (supplier-neutral spectral proxy) |
| L2 | Biconcave Negative | S-LAH66 (supplier-neutral spectral proxy) |
| L3 | Biconvex Positive | S-NPH3 (supplier-neutral spectral proxy) |
| L4 | Biconvex Positive (1× Asph) | S-BSM14 (supplier-neutral spectral proxy) |
| L5 | Biconvex Positive | S-FPL51 (supplier-neutral spectral proxy) |
| L6 | Negative Meniscus | S-TIH53 (supplier-neutral spectral proxy) |
| L7 | Negative Meniscus | S-TIH53 (supplier-neutral spectral proxy) |
| L8 | Positive Meniscus | S-FPL53 (supplier-neutral spectral proxy) |
| L9 | Biconvex Positive | CaF2 (supplier-neutral spectral proxy) |
| L10 | Biconvex Positive | S-LAH66 (supplier-neutral spectral proxy) |
| L11 | Negative Meniscus | S-LAH99 (supplier-neutral spectral proxy) |
| L12 | Biconcave Negative | S-LAL18 (supplier-neutral spectral proxy) |
| L13 | Biconvex Positive | S-TIH11 (supplier-neutral spectral proxy) |
| L14 | Negative Meniscus | S-LAH55V (supplier-neutral spectral proxy) |
| L15 | Biconcave Negative | S-LAL18 (supplier-neutral spectral proxy) |
| L16 | Biconvex Positive | S-NPH2 (supplier-neutral spectral proxy) |
| L17 | Biconvex Positive | S-BSM14 (supplier-neutral spectral proxy) |
| L18 | Biconvex Positive | S-FSL5 (supplier-neutral spectral proxy) |
| L19 | Negative Meniscus | J-LASFH17 (supplier-neutral spectral proxy) |
| L20 | Positive Meniscus | S-BAL35 (supplier-neutral spectral proxy) |
| L21 | Biconcave Negative | S-LAH58 (supplier-neutral spectral proxy) |
| L22 | Biconvex Positive | S-NPH2 (supplier-neutral spectral proxy) |
| L23 | Biconcave Negative | J-LASFH17 (supplier-neutral spectral proxy) |
| L24 | Biconvex Positive | S-FSL5 (supplier-neutral spectral proxy) |
| L25 | Biconvex Positive | S-FSL5 (supplier-neutral spectral proxy) |
| L26 | Positive Meniscus | S-FSL5 (supplier-neutral spectral proxy) |
| L27 | Negative Meniscus | S-TIH53 (supplier-neutral spectral proxy) |