US 2003/0156333 A1 — Yasuharu Yamada
| 28-300mm marketed / 28.9958-289.5284mm modeled |
| f/3.5-6.3 marketed / f/3.5000-6.5122 modeled wide-open |
| 13 groups / 15 physical lens pieces |
| 3 bonded aspherical resin surfaces |
| 0.49m MFD / 1:2.9 at 300mm |
CONSTRAINED_RECONSTRUCTION: G2 only; close-focus spacings solved from Tamron 0.49 m MFD with fixed image plane and D5 + D14 conserved at each zoom state.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-TIH53 (OHARA) |
| L2 | Biconvex Positive | S-FPL51 (OHARA) |
| L3 | Positive Meniscus | S-LAH66N (OHARA) |
| R6 | Bonded Aspheric Resin Layer | Unmatched (bonded aspheric resin; nd=1.53610, vd=41.2) |
| L4 | Negative Meniscus | S-LAH55VS (OHARA) |
| L5 | Biconcave Negative | S-LAL14 (OHARA) |
| L6 | Biconvex Positive | S-TIH53 (OHARA) |
| L7 | Biconcave Negative | S-LAH55VS (OHARA) |
| R16 | Bonded Aspheric Resin Layer | Unmatched (bonded aspheric resin; nd=1.53610, vd=41.2) |
| L8 | Positive Meniscus | S-PHM52 (OHARA) |
| L9 | Biconvex Positive | S-FPL51 (OHARA) |
| L10 | Biconcave Negative | S-TIH53 (OHARA) |
| L11 | Biconvex Positive | S-FSL5 (OHARA) |
| L12 | Negative Meniscus | S-LAH66N (OHARA) |
| L13 | Biconvex Positive | S-NSL3 (OHARA) |
| R29 | Bonded Aspheric Resin Layer | Unmatched (bonded aspheric resin; nd=1.53610, vd=41.2) |
| L14 | Biconvex Positive | S-TIL2 (OHARA) |
| L15 | Biconcave Negative | S-LAH66N (OHARA) |