JPS52-141223A — Yusuke Nanjo
| 5 ELEMENTS / 3 GROUPS |
| f = 150.026 mm (MODELED) |
| F/4 |
| 2ω = 33° |
| ALL-SPHERICAL |
| EXTERNAL BELLOWS FOCUS |
CONSTRAINED_RECONSTRUCTION: external unit focus on the RB67 bellows. All internal gaps remain fixed; BF changes from 120.471282 mm at infinity to 164.755082 mm at the published 0.856 m object-to-film distance, giving 0.295173× paraxial magnification.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | 694533 class (vendor unspecified) |
| L2 | Biconcave Negative | 603607 class (vendor unspecified) |
| L3 | Biconcave Negative | 673321 class (vendor unspecified) |
| L4 | Biconvex Positive | 734515 class (vendor unspecified) |
| L5 | Negative Meniscus | 720502 class (vendor unspecified) |