JP S55-24081 B2 — Masayoshi Okazaki
| 6 ELEMENTS / 4 GROUPS |
| f = 80.121 mm (DESIGN) |
| F/4 |
| 2ω = 47.195° |
| FLOATING FOCUS TO 1:2 |
PUBLISHED floating-focus model using the patent beta=0 to beta=-1/2 internal gaps; the rear image distance is the independently solved finite conjugate. The bare lens reaches 1:2. The published beta=-1 state uses the optional Auto Macro Spacer and is not included.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | 720502 — lanthanum crown (vendor unspecified) |
| L2 | Negative Meniscus | 575415 — light flint / TIL27-LF7 class (vendor unspecified) |
| L3 | Positive Meniscus | 620603 — SK16 / barium crown class (vendor unspecified) |
| L4 | Negative Meniscus | 699301 — SF15 / TIM35 dense flint class (vendor unspecified) |
| L5 | Positive Meniscus | 720502 — lanthanum crown (vendor unspecified) |
| L6 | Negative Meniscus | 673321 — SF5 / TIM25 dense flint class (vendor unspecified) |