US 4,806,003 — Hiromu Mukai, Hisashi Tokumaru
| 10 ELEMENTS / 8 GROUPS |
| 35mm MARKETED / 34.983 mm DESIGN |
| f/1.4 MARKETED / F/1.45 DESIGN |
| 2ω = 64° PATENT FIELD |
| 1 ASPHERICAL SURFACE |
| DOUBLE-FLOATING REAR FOCUS |
CONSTRAINED_RECONSTRUCTION: GI is fixed; GII (E4-E6) and GIII (E7-E10) translate objectward with x3/x2=1.43 from Table 2, solved to beta=-0.175 at a fixed image plane. The stop moves with GII. The reconstructed image-plane-to-object distance is 0.30874 m; Minolta specifies 0.3 m minimum focus. Fig. 7 text states R=1.15, contradicting Table 2 and therefore not used for the primary model.
| Element | Type | Glass |
|---|---|---|
| E1 | Negative Meniscus | 623570 SK10-class (vendor unresolved) |
| E2 | Biconcave Negative | 617540 SSK1-class (vendor unresolved) |
| E3 | Biconvex Positive | J-LASF014 coefficient proxy (supplier unspecified; patent 1.78850/45.68) |
| E4 | Biconvex Positive | J-LASF014 coefficient proxy (supplier unspecified; patent 1.78850/45.68) |
| E5 | Biconvex Positive | Q-LASFPH2S coefficient proxy (supplier unspecified; patent 1.76500/46.25) |
| E6 | Biconcave Negative | 723380 BAF/BASF-class (vendor unresolved) |
| E7 | Biconcave Negative | 755275 SF4/TIH4-class (vendor unresolved) |
| E8 | Biconvex Positive | 720503 LAK10/LAC10-class (vendor unresolved) |
| E9 | Positive Meniscus (1× Asph) | 720503 LAK10/LAC10-class (vendor unresolved) |
| E10 | Biconvex Positive | 720503 LAK10/LAC10-class (vendor unresolved) |