KR 10-2077265 B1, Example 3 — Jae Myung Yu, Hae Jin Lee, Jung Du Lee, Moon-Kyung Kim
| 12 ELEMENTS / 10 GROUPS |
| 35mm f/1.2 (MARKETED) |
| COMPUTED EFL 35.961900 mm / F1.254 (PATENT) |
| 2ω = 64.054° (PATENT INFINITY) |
| 2 ASPHERICAL ELEMENTS / 4 ASPHERICAL SURFACES |
| 0.34 m MFD / 0.17× (MARKETED) |
Published floating internal focus: G23 and G33 move objectward by 5.796 and 6.962 mm relative to G13. G13 is mechanically fixed in the patent. The preserved image-reference spacing adds a 0.044 mm common objectward shift in the fixed-image-plane chart. The nearest published state corresponds to about 0.34 m.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | 847238 — high-index flint class (vendor unspecified) |
| L2 | Negative Meniscus | 497816 — low-dispersion crown class (vendor unspecified) |
| L3 | Biconcave Negative | 755275 — dense-flint class (vendor unspecified) |
| L4 | Plano-Convex Positive | 001291 — very-high-index glass class (vendor unspecified) |
| L5 | Plano-Convex Positive | 923209 — dense high-dispersion flint class (vendor unspecified) |
| L6 | Biconvex Positive | 835427 — high-index glass class (vendor unspecified) |
| L7 | Biconvex Positive | 713539 — lanthanum crown class (vendor unspecified) |
| L8 | Biconcave Negative | 728283 — flint class (vendor unspecified) |
| L9 | Biconcave Negative (2× Asph) | E-FD8 catalog-equivalent (patent coordinates retained; production supplier unspecified) |
| L10 | Biconvex Positive | 497816 — low-dispersion crown class (vendor unspecified) |
| L11 | Biconcave Negative | 593354 — flint class (vendor unspecified) |
| L12 | Biconvex Positive (2× Asph) | L-LAH85V catalog-equivalent (patent coordinates retained; production supplier unspecified) |