FR 1,045,076, sole example
| 5 ELEMENTS / 4 GROUPS |
| MARKETED 180mm f/5.5 |
| COMPUTED EFL 182.266 mm |
| MODELED f/5.473 |
| ALL SPHERICAL |
The patent provides only an infinity prescription. View-camera bellows focusing is not modeled.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | Barium-flint BAF3/BAM3 class |
| L2 | Biconcave Negative | SF10 class |
| L3 | Biconvex Positive | E-BAF8 compatible barium-flint spectral proxy; patent vendor unspecified |
| L4 | Biconcave Negative | LF3 / PBL23 / QF5 class |
| L5 | Biconvex Positive | SF4-family flint class |