TAMRON 18-400mm f/3.5-6.3 Di II VC HLD — Optical Cross-Section & Ray Tracing

Home / Lenses / Tamron / TAMRON 18-400mm f/3.5-6.3 Di II VC HLDTAMRON 18-400mm f/3.5-6.3 Di II VC HLDJP 2017-116646 A↗ — Dayong Li
16 ELEMENTS / 11 GROUPS
18-400mm MARKETING / 18.5105-389.00mm PATENT
MODELED F/3.4059-6.4828
4 ASPHERICAL SURFACES
G2 INNER FOCUS / G4 VC
Focus MechanismCONSTRAINED_RECONSTRUCTION: JP 2017-116646 A states that G2 alone focuses. Close-focus rows are code-solved at the Tamron production MOD of 0.45 m measured subject-to-image plane, translating only G2 objectward and conserving D(5)+D(14) at each published zoom state.
Optical Elements (16 physical; 17 modeled media)ElementTypeGlass
L1Negative Meniscus911353 coordinate class
L2Biconvex Positive497816 coordinate class
L3Positive Meniscus550755 coordinate class
L4aThin Aspheric Layer (1x Asph)Unmatched (thin aspheric layer; patent nd=1.51460, vd=49.96)
L4bNegative Meniscus911353 coordinate class
L5Biconcave Negative618634 coordinate class
L6Biconvex Positive847238 coordinate class
L7Negative Meniscus881401 coordinate class
L8Biconvex Positive517642 coordinate class
L9Biconvex Positive497816 coordinate class
L10Biconvex Positive487704 coordinate class
L11Negative Meniscus847238 coordinate class
L12Biconcave Negative (1x Asph)851401 coordinate class
L13Positive Meniscus808228 coordinate class
L14Biconvex Positive (2x Asph)592670 coordinate class
L15Biconcave Negative911353 coordinate class
L16Biconvex Positive603380 coordinate class

Element	Type	Glass
L1	Negative Meniscus	911353 coordinate class
L2	Biconvex Positive	497816 coordinate class
L3	Positive Meniscus	550755 coordinate class
L4a	Thin Aspheric Layer (1x Asph)	Unmatched (thin aspheric layer; patent nd=1.51460, vd=49.96)
L4b	Negative Meniscus	911353 coordinate class
L5	Biconcave Negative	618634 coordinate class
L6	Biconvex Positive	847238 coordinate class
L7	Negative Meniscus	881401 coordinate class
L8	Biconvex Positive	517642 coordinate class
L9	Biconvex Positive	497816 coordinate class
L10	Biconvex Positive	487704 coordinate class
L11	Negative Meniscus	847238 coordinate class
L12	Biconcave Negative (1x Asph)	851401 coordinate class
L13	Positive Meniscus	808228 coordinate class
L14	Biconvex Positive (2x Asph)	592670 coordinate class
L15	Biconcave Negative	911353 coordinate class
L16	Biconvex Positive	603380 coordinate class