JP S42-023896 — Günter Klemt
| 6 ELEMENTS / 4 GROUPS |
| f = 76.51 mm (75 mm nominal) |
| F/8 |
| 2ω = 100° AT F/22 |
| ALL-SPHERICAL |
Unit focus by camera standard/bellows; 0.75 m is a declared visualization endpoint, not a manufacturer MFD.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | FK3 class (465/657; probable historical Schott FK3) |
| L2 | Negative Meniscus | SF1 (Schott, legacy dense flint; 717/295) |
| L3 | Positive Meniscus | FEL3 (HOYA catalog-equivalent; production supplier unspecified) |
| L4 | Plano-Convex Positive | BAF3 class (583/465; modern Schott N-BAF3 / Hikari J-BAF3 equivalents) |
| L5 | Negative Meniscus | SF1 (Schott, legacy dense flint; 717/295) |
| L6 | Negative Meniscus | FK3 class (465/657; probable historical Schott FK3) |