US 2021/0003832 A1 — Masato Katayose, Junya Ichimura
| 20 ELEMENTS / 14 GROUPS |
| 100-500mm f/4.5-7.1 (MARKETED) |
| EXAMPLE 2: 103-490mm f/4.60-7.20 |
| 8 ZOOM UNITS (+ - + - + - + -) |
| WIDE→TELE: L1/L3/L5-L8 OBJECT-SIDE; L2 FIXED; L4 REVERSES |
| CLOSE FOCUS: L4 OBJECT-SIDE / L6 IMAGE-SIDE (UNMODELED) |
| ALL-SPHERICAL |
NO_INTERNAL_RECONSTRUCTION: the patent publishes infinity-focus zoom spacings only. For closer focus it states that L4 moves object-side and L6 image-side, but no finite-focus positions are authored.
| Element | Type | Glass |
|---|---|---|
| L11 | Positive Meniscus | S-FPL51 (OHARA catalog equivalent; production supplier unspecified) |
| L12 | Negative Meniscus | S-NBM51 (OHARA catalog equivalent; production supplier unspecified) |
| L13 | Positive Meniscus | S-FPL55 (OHARA catalog equivalent; production supplier unspecified) |
| L21 | Negative Meniscus | S-LAL14 (OHARA catalog equivalent; production supplier unspecified) |
| L22 | Biconcave Negative | S-FPL51 (OHARA catalog equivalent; production supplier unspecified) |
| L23 | Positive Meniscus | S-TIH14 (OHARA catalog equivalent; production supplier unspecified) |
| L31 | Biconvex Positive | S-FPL51 (OHARA catalog equivalent; production supplier unspecified) |
| L32 | Biconvex Positive | S-FTM16 (OHARA catalog equivalent; production supplier unspecified) |
| L33 | Biconcave Negative | TAFD45L (HOYA catalog equivalent; production supplier unspecified; patent class 954323) |
| L41 | Negative Meniscus | S-FPL51 (OHARA catalog equivalent; production supplier unspecified) |
| L51 | Positive Meniscus | S-TIM28 (OHARA catalog equivalent; production supplier unspecified) |
| L52 | Biconvex Positive | S-NSL3 (OHARA catalog equivalent; production supplier unspecified) |
| L53 | Negative Meniscus | TAFD65 (HOYA catalog equivalent; production supplier unspecified; patent class 051269) |
| L54 | Plano-Convex Positive | S-FPL51 (OHARA catalog equivalent; production supplier unspecified) |
| L61 | Biconvex Positive | S-TIM22 (OHARA catalog equivalent; production supplier unspecified) |
| L62 | Biconcave Negative | S-LAH66 (OHARA catalog equivalent; production supplier unspecified) |
| L71 | Biconvex Positive | S-FSL5 (OHARA catalog equivalent; production supplier unspecified) |
| L81 | Biconcave Negative | FCD515 (HOYA catalog equivalent; production supplier unspecified; patent class 593686) |
| L82 | Biconcave Negative | S-FPL51 (OHARA catalog equivalent; production supplier unspecified) |
| L83 | Biconvex Positive | S-NBH8 (OHARA catalog equivalent; production supplier unspecified) |