US 4,153,338 A, Embodiment 3 — Toru Fujii
| 10 ELEMENTS / 8 GROUPS |
| DESIGN f = 35–66.1 mm (SCALED) |
| DESIGN F/3.6 |
| ALL SPHERICAL |
The Olympus manual specifies rotating-helicoid focusing to 0.8 m, but neither source gives the optical group movements or travel for finite focus. Only infinity zoom compensation is modeled. Both focus positions use identical geometry at every zoom setting; the 0.8 m minimum focus distance is a product specification, not a simulated focus state.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-BSM36 (OHARA catalog equivalent; production supplier unspecified) |
| L2 | Biconcave | S-LAL8 (OHARA catalog equivalent; production supplier unspecified) |
| L3 | Positive Meniscus | S-BSM16 (OHARA catalog equivalent; production supplier unspecified) |
| L4 | Biconvex | S-TIL25 (OHARA catalog equivalent; production supplier unspecified) |
| L5 | Biconvex | S-PHM52 (OHARA catalog equivalent; production supplier unspecified) |
| L6 | Positive Meniscus | S-PHM52 (OHARA catalog equivalent; production supplier unspecified) |
| L7 | Biconvex | S-PHM52 (OHARA catalog equivalent; production supplier unspecified) |
| L8 | Biconcave | PBM22 (OHARA catalog equivalent; production supplier unspecified) |
| L9 | Biconcave | S-LAM7 (OHARA catalog equivalent; production supplier unspecified) |
| L10 | Biconvex | F4 (SUMITA catalog equivalent; production supplier unspecified) |