LAOWA 58mm f/2.8 2× Ultra-Macro APO — Optical Cross-Section & Ray Tracing

Home / Lenses / Laowa / LAOWA 58mm f/2.8 2× Ultra-Macro APOLAOWA 58mm f/2.8 2× Ultra-Macro APOCN 116520542 A Example 2 — Laowa / Li Dayong
14 ELEMENTS / 11 GROUPS
f ≈ 59.2 mm
F/2.9
2ω ≈ 39.9°
ALL SPHERICAL
2× MACRO (MFD 0.185 m)
Focus MechanismDual-group internal focusing. G2 (L3–L9 + STO) advances 47.0 mm toward object; G3 (L10–L14) advances 8.1 mm. G1 (L1–L2) fixed. Constant barrel length (internal focusing).
Optical Elements (14)ElementTypeGlass
L1Negative Meniscus866450 - high-index lanthanum flint (patent nd=1.86665, vd=45.0)
L2Biconvex PositiveH-ZF13 (CDGM)
L3Biconvex PositiveH-FK61 (CDGM)
L4Positive MeniscusH-LAK53A (CDGM)
L5Biconcave NegativeH-ZF72 (CDGM)
L6Biconvex PositiveH-ZLAF92 (CDGM)
L7Negative MeniscusH-ZF52 (CDGM)
L8Biconvex PositiveH-FK61 (CDGM)
L9Biconvex PositiveH-ZLAF68N (CDGM)
L10Negative MeniscusUnmatched lanthanum flint (patent nd=1.79391, νd=47.17; not catalog H-LAF4)
L11Biconcave Negative545486 - crown glass (patent nd=1.54517, vd=48.63)
L12Biconvex PositiveH-ZLAF55C (CDGM)
L13Negative MeniscusH-FK61 (CDGM)
L14Equi-Biconvex PositiveH-FK61 (CDGM)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Negative Meniscus	866450 - high-index lanthanum flint (patent nd=1.86665, vd=45.0)
L2	Biconvex Positive	H-ZF13 (CDGM)
L3	Biconvex Positive	H-FK61 (CDGM)
L4	Positive Meniscus	H-LAK53A (CDGM)
L5	Biconcave Negative	H-ZF72 (CDGM)
L6	Biconvex Positive	H-ZLAF92 (CDGM)
L7	Negative Meniscus	H-ZF52 (CDGM)
L8	Biconvex Positive	H-FK61 (CDGM)
L9	Biconvex Positive	H-ZLAF68N (CDGM)
L10	Negative Meniscus	Unmatched lanthanum flint (patent nd=1.79391, νd=47.17; not catalog H-LAF4)
L11	Biconcave Negative	545486 - crown glass (patent nd=1.54517, vd=48.63)
L12	Biconvex Positive	H-ZLAF55C (CDGM)
L13	Negative Meniscus	H-FK61 (CDGM)
L14	Equi-Biconvex Positive	H-FK61 (CDGM)