US 2016/0103303 A1 — Masakazu Saori
| 19 ELEMENTS / 15 GROUPS (PATENT) |
| 19 ELEMENTS / 16 GROUPS (MARKETED) |
| 70-200mm f/2.8 (MARKETED) |
| 72.06-194.00mm f/2.9 (PATENT) |
| 43.28mm IMAGE CIRCLE |
| ALL-SPHERICAL INTERNAL ZOOM |
CONSTRAINED_RECONSTRUCTION: G3 alone translates toward the image at closer focus. At 1.2 m from the fixed image plane, the solved G3 shifts are 3.287999 mm (72.06 mm), 5.615212 mm (100 mm), and 15.514881 mm (194 mm); d15+d20 is conserved at each zoom station. The patent publishes the direction and mechanism but no finite-focus spacing table.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus, concave to image | S-LAH60 (OHARA) |
| L2 | Positive Meniscus, convex to object | S-FPL51 (OHARA) |
| L3 | Biconvex Positive | S-FPL53 (OHARA) |
| L4 | Positive Meniscus, convex to object | S-FPM2 (OHARA) |
| L5 | Positive Meniscus, convex to image | S-LAH95 (OHARA) |
| L6 | Biconcave Negative | S-LAH59 (OHARA) |
| L7 | Biconcave Negative | S-FPM2 (OHARA) |
| L8 | Biconvex Positive | S-TIH6 (OHARA) |
| L9 | Biconcave Negative | S-LAH55V (OHARA) |
| L10 | Biconvex Positive | S-LAH65V (OHARA) |
| L11 | Positive Meniscus, convex to image | S-FPL51 (OHARA) |
| L12 | Negative Meniscus, convex to image | S-TIH53W (OHARA) |
| L13 | Negative Meniscus, convex to image | S-NBM51 (OHARA) |
| L14 | Biconvex Positive | S-FPM2 (OHARA) |
| L15 | Positive Meniscus, convex to object | S-FPL53 (OHARA) |
| L16 | Biconcave Negative | S-LAH51 (OHARA) |
| L17 | Biconvex Positive | S-FPM2 (OHARA) |
| L18 | Negative Meniscus, convex to image | S-LAH59 (OHARA) |
| L19 | Positive Meniscus, convex to image | S-LAH95 (OHARA) |