JP 2023-180574 A, Numerical Example 5 — Ryosuke Sato
| 27 ELEMENTS / 19 GROUPS |
| DESIGN f = 62.00–580.00 mm |
| DESIGN F/4.64–6.50 |
| ALL SPHERICAL |
| 2 FLD + 3 SLD ELEMENTS |
Rear focus by G5, the single lens L20, which moves toward the object for nearer subjects (JP 2023-180574 A ¶0134). Example 5 prints infinity spacings only, so both focus positions repeat the infinity gaps and no near-focus state is modeled; 0.45 m is Sigma's wide-end minimum focus (2.6 m at the tele end). The zoom path between the three printed stations is solved, not printed: d5, d10, d20, d32 and d42 run linearly and G6 is placed to keep the image on the printed image plane.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | TAFD32 class (HOYA coordinate equivalent) |
| L2 | Positive Meniscus | FCD1 class (HOYA coordinate equivalent) |
| L3 | Positive Meniscus | FCD100 class (HOYA coordinate equivalent) |
| L4 | Biconvex Positive | FD225 class (HOYA coordinate equivalent) |
| L5 | Biconcave Negative | TAFD32 class (HOYA coordinate equivalent) |
| L6 | Biconcave Negative | TAFD32 class (HOYA coordinate equivalent) |
| L7 | Biconvex Positive | E-CF6 class (HOYA coordinate equivalent) |
| L8 | Negative Meniscus | E-FD80 class (HOYA coordinate equivalent) |
| L9 | Positive Meniscus | E-CF6 class (HOYA coordinate equivalent) |
| L10 | Biconcave Negative | PCD51 class (HOYA coordinate equivalent) |
| L11 | Biconcave Negative | PCD51 class (HOYA coordinate equivalent) |
| L12 | Biconvex Positive | S-NBH58 class (OHARA coordinate equivalent) |
| L13 | Biconvex Positive | FD60-W / FD60 class (HOYA coordinate equivalents) |
| L14 | Biconvex Positive | FCD1 class (HOYA coordinate equivalent) |
| L15 | Biconcave Negative | TAFD55-W / TAFD55 class (HOYA coordinate equivalents) |
| L16 | Positive Meniscus | FD60-W / FD60 class (HOYA coordinate equivalents) |
| L17 | Negative Meniscus | S-NPH5 class (OHARA coordinate equivalent) |
| L18 | Biconvex Positive | E-CF6 class (HOYA coordinate equivalent) |
| L19 | Biconcave Negative | TAFD33 class (HOYA coordinate equivalent) |
| L20 | Biconvex Positive | S-BAL3 class (OHARA coordinate equivalent) |
| L21 | Biconvex Positive | NBFD29 class (HOYA coordinate equivalent) |
| L22 | Negative Meniscus | TAFD33 class (HOYA coordinate equivalent) |
| L23 | Negative Meniscus | FCD100 class (HOYA coordinate equivalent) |
| L24 | Biconvex Positive | E-FD5 class (HOYA coordinate equivalent) |
| L25 | Negative Meniscus | FCD515 / FCD505 class (HOYA coordinate equivalents) |
| L26 | Biconvex Positive | E-FD13 class (HOYA coordinate equivalent) |
| L27 | Biconcave Negative | TAFD65 class (HOYA coordinate equivalent) |