CN 118584637 A — Dayong Li
| 13 ELEMENTS / 10 GROUPS |
| DESIGN f = 101.99 mm |
| DESIGN F/2.87 |
| 67 mm IMAGE CIRCLE |
| SHIFT ±12 mm / TILT ±10° |
PUBLISHED coaxial spacings at infinity, source 0.5x and source 1.0x labels. G1 fixed; G2/G3 independently move objectward. Source labels retained; Gaussian endpoint magnification -0.956664. closeFocusM is the calculated source-endpoint object-to-image distance, not marketed MFD. Intermediate focusT is the derived endpoint/intermediate object-to-image distance ratio; interpolated gaps and distance labels do not certify focus. No noncoaxial prescription or mechanical hinge is supplied.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconcave Negative | Unmatched (native nd=1.53031, vd=67.42; supplier unconfirmed) |
| L2 | Positive Meniscus | Unmatched (native nd=1.87510, vd=45.25; supplier unconfirmed) |
| L3 | Positive Meniscus | Unmatched (native nd=1.89141, vd=33.77; supplier unconfirmed) |
| L4 | Biconcave Negative | Unmatched (native nd=1.78737, vd=23.92; supplier unconfirmed) |
| L5 | Biconvex Positive | E-FDS1 (HOYA, coordinate equivalent; supplier unconfirmed) |
| L6 | Biconcave Negative | Unmatched (native nd=1.91392, vd=23.35; supplier unconfirmed) |
| L7 | Biconvex Positive | FCD1 (HOYA, coordinate equivalent; supplier unconfirmed) |
| L8 | Biconvex Positive | TAFD33 (HOYA, coordinate equivalent; supplier unconfirmed) |
| L9 | Negative Meniscus | Unmatched (native nd=1.88564, vd=21.55; supplier unconfirmed) |
| L10 | Biconcave Negative | E-FD8 (HOYA, coordinate equivalent; supplier unconfirmed) |
| L11 | Biconvex Positive | Unmatched (native nd=1.90326, vd=27.29; supplier unconfirmed) |
| L12 | Plano-Concave | FCD1 (HOYA, coordinate equivalent; supplier unconfirmed) |
| L13 | Biconvex Positive | Unmatched (native nd=1.87156, vd=41.46; supplier unconfirmed) |