DE 3907928 A1 Table 5 - EFL-reconciled reconstruction
| 150mm marketed / 148.7mm design |
| f/5.6 |
| 8 elements / 5 groups in reconstructed table |
| 80° published field |
| all-spherical |
Unit focus on a view-camera bellows; close endpoint is an illustrative 3.5 m object distance, not a manufacturer minimum-focus specification.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | N-BK7 class (Schott equivalent; patent-rounded nd/vd) |
| L2 | Positive Meniscus | N-PSK53A class (Schott equivalent; patent-rounded nd/vd) |
| L3 | Negative Meniscus | Unmatched (dense lanthanum/barium flint class; patent-rounded nd=1.69, vd=49.6) |
| L4 | Positive Meniscus | K10 class (Schott equivalent; patent-rounded nd/vd) |
| L5 | Positive Meniscus | CaF2 class (inferred; EFL-reconciled Table 5 model) |
| L6 | Positive Meniscus | FK3 class (Schott legacy equivalent; patent-rounded nd/vd) |
| L7 | Positive Meniscus | N-KZFS5 class (Schott equivalent; patent-rounded nd/vd) |
| L8 | Plano-Concave Negative | Unmatched (dense crown / short-flint class; patent-rounded nd=1.62, vd=53.2) |
Detailed analysis available in the interactive viewer above.