JP 2023-004721 A — Hisayuki Yamanaka
| 21 ELEMENTS / 15 GROUPS |
| DESIGN f = 36.03–145.53 mm |
| DESIGN F/2.06–2.91 |
| 5 ASPHERICAL SURFACES / 3 ELEMENTS |
PUBLISHED source test states at approximately 0.8 m object-to-image: negative G4 (L17/L18) shifts imageward 0.9000/2.9261/8.4650 mm at wide/mid/tele. Linear interpolation is unverified; these endpoints are not marketed MFD.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | TAFD35L (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L2 | Biconvex Positive | FCD1 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L3 | Positive Meniscus | FCD1 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L4 | Negative Meniscus | TAFD32 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L5 | Biconvex Positive | FD60-W (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L6 | Biconcave Negative | TAFD32 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L7 | Biconcave Negative | FCD515 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L8 | Biconvex Positive | TAFD35L (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L9 | Negative Meniscus | TAC8 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L10 | Positive Meniscus | E-FDS1-W (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L11 | Positive Meniscus | FCD515 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L12 | Negative Meniscus | FDS90-SG (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L13 | Biconvex Positive | PCD4 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L14 | Biconcave Negative | TAFD25L (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L15 | Negative Meniscus (1× Asph) | L-LAH53 (OHARA coordinate equivalent; supplier unconfirmed) |
| L16 | Biconvex Positive (2× Asph) | M-TAF401 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L17 | Biconvex Positive | E-FDS1-W (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L18 | Biconcave Negative | S-LAM66 (OHARA coordinate equivalent; supplier unconfirmed) |
| L19 | Negative Meniscus | TAFD35L (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L20 | Biconvex Positive | S-FTM16 (OHARA coordinate equivalent; supplier unconfirmed) |
| L21 | Negative Meniscus (2× Asph) | L-LAL13 (OHARA coordinate equivalent; supplier unconfirmed) |