US 4,770,511 Example 2 — Nippon Kogaku / Yonezawa, Aono & Takahashi
| 17 elements / 13 groups |
| f = 36.23-194.85 mm computed |
| F/3.5-4.5 nominal |
| 135 full-frame coverage |
| All-spherical prescription |
Normal focusing is by the first lens group. The close-focus endpoint modeled here is the patent telephoto-end macro state at β = -0.25.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | SF6 / S-TIH6 class (dense flint, 805/254) |
| L2 | Biconvex Positive | FK / J-FKH1 class (fluorophosphate crown, 498/823) |
| L3 | Positive Meniscus | BAF10-class barium flint (670/471, near-match) |
| L4 | Negative Meniscus | J-LASFH9A class (Hikari, 903/358) |
| L5a | Positive Meniscus | SF6 / S-TIH6 class (dense flint, 805/254) |
| L5b | Negative Meniscus | LAH65V-class lanthanum flint (804/464, near-match) |
| L6a | Negative Meniscus | J-LAK8 / LAK8 class (713/540) |
| L6b | Positive Meniscus | J-SFH2 class (very dense flint, 861/230) |
| L7 | Positive Meniscus | BK7 / J-BK7A / S-BSL7 class (517/641) |
| L8 | Biconvex Positive | PKH1-class phosphate crown (519/700) |
| L9 | Negative Meniscus | J-SFH2 class (very dense flint, 861/230) |
| L10 | Biconvex Positive | BK7 / J-BK7A / S-BSL7 class (517/641) |
| L11 | Positive Meniscus | S-BSM16 / J-SK16 / N-SK16 class (620/603) |
| L12 | Biconcave Negative | Unmatched lanthanum-flint-region glass (796/410) |
| L13 | Positive Meniscus | BK7 / J-BK7A / S-BSL7 class (517/641) |
| L14a | Positive Meniscus | Unmatched crown glass (518/603) |
| L14b | Negative Meniscus | LAH64-class lanthanum flint (788/475, near-match) |
Detailed analysis available in the interactive viewer above.