US 4,062,630, Example V — Sei Matsui
| 6 elements / 4 groups |
| Ai / Ai-S Nikkor 135mm f/2 (1977–2005) |
| f = 135 mm (patent f = 100 mm × 1.35) |
| Tele-Sonnar / Ernostar variant |
Unit focusing — entire optical assembly translates forward; only BFD changes (1.3 m close state calculated, not published)
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | S-LAM3 (catalog-compatible spectral proxy; production supplier unresolved) |
| L2 | Negative Meniscus | H-BaF8 (catalog-compatible spectral proxy; production supplier unresolved) |
| L3 | Positive Meniscus | S-BAL35 (catalog-compatible spectral proxy; production supplier unresolved) |
| L4 | Plano-Convex Positive | FD3 (catalog-compatible spectral proxy; production supplier unresolved) |
| L5 | Biconcave Negative | SF1 (catalog-compatible spectral proxy; production supplier unresolved) |
| L6 | Positive Meniscus | SF1 (catalog-compatible spectral proxy; production supplier unresolved) |