US 2006/0007561 A1 — Takashi Suzuki
| 7 ELEMENTS / 6 GROUPS |
| 4 ASPHERICAL SURFACES ON L4 AND L6 |
| Design f/1.96; marketed f/1.9 |
| INFINITY PRESCRIPTION; FINITE FOCUS NOT MODELED |
Only the published infinity prescription is modeled. The camera autofocuses to 0.4 m, but the source gives no lens travel or close-focus spacings.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconcave Negative | E-FD2 (HOYA spectral proxy; production glass unconfirmed) |
| L2 | Biconvex Positive | S-LAH58 (OHARA spectral proxy; production glass unconfirmed) |
| L3 | Negative Meniscus | J-SF03 (HIKARI spectral proxy; production glass unconfirmed) |
| L4 | Negative Meniscus (2× Asph) | S-TIM28 (OHARA spectral proxy; production glass unconfirmed) |
| L5 | Positive Meniscus | TAC8 (HOYA spectral proxy; production glass unconfirmed) |
| L6 | Negative Meniscus (2× Asph) | Unmatched (nd=1.49023, νd=57.5; rear aspheric material, polymer identity unconfirmed) |
| L7 | Biconcave Negative | S-BAL3 (OHARA spectral proxy; production glass unconfirmed) |