CANON RF 15-35mm f/2.8 L IS USM — Optical Cross-Section & Ray Tracing

Home / Lenses / Canon / CANON RF 15-35mm f/2.8 L IS USMCANON RF 15-35mm f/2.8 L IS USMUS 2020/0257181 A1↗ — Yuichi Gyoda
16 elements / 12 groups
3 aspherical elements (6 surfaces)
Patent nd/vd; compatible glass counterparts
Centered IS (B4)
Infinity-focus model
Focus MechanismInfinity-focus model: B2 (L5–L7) moves imageward for close focus, but the patent publishes no finite-focus gaps. The disabled 0.28 m endpoint is retained retail metadata. Source iris diameters vary with zoom. IS is centered; omitted flare diaphragm S21 clipping is not simulated.
Optical Elements (16 physical)ElementTypeGlass
L1Neg. Meniscus (2× Asph)S-BAL42 — compatible catalog counterpart; patent identity unspecified
L2Biconcave Neg. (2× Asph)L-LAH85V — compatible catalog counterpart; patent identity unspecified
L3Biconcave NegativeS-FPM2 — compatible catalog counterpart; patent identity unspecified
L4Biconvex PositiveS-NBH56 — compatible catalog counterpart; patent identity unspecified
L5Biconvex PositiveS-TIH53 — compatible catalog counterpart; patent identity unspecified
L6Negative MeniscusPBH21 — compatible catalog counterpart; patent identity unspecified
L7Positive MeniscusS-TIL6 — compatible catalog counterpart; patent identity unspecified
L8Negative MeniscusTAFD40 — compatible catalog counterpart; patent identity unspecified
L9Biconvex PositiveS-FPM3 — compatible catalog counterpart; patent identity unspecified
L10Positive MeniscusPBH21 — compatible catalog counterpart; patent identity unspecified
L11Biconcave NegativeS-LAH60 — compatible catalog counterpart; patent identity unspecified
L12Biconvex PositiveFCD1 — compatible catalog counterpart; patent identity unspecified
L13Biconvex PositiveFCD1 — compatible catalog counterpart; patent identity unspecified
L14Biconcave NegativeTAFD65 — compatible catalog counterpart; patent identity unspecified
L15Neg. Meniscus (2× Asph)L-LAH85V — compatible catalog counterpart; patent identity unspecified
L16Biconvex PositivePBH21 — compatible catalog counterpart; patent identity unspecified

Element	Type	Glass
L1	Neg. Meniscus (2× Asph)	S-BAL42 — compatible catalog counterpart; patent identity unspecified
L2	Biconcave Neg. (2× Asph)	L-LAH85V — compatible catalog counterpart; patent identity unspecified
L3	Biconcave Negative	S-FPM2 — compatible catalog counterpart; patent identity unspecified
L4	Biconvex Positive	S-NBH56 — compatible catalog counterpart; patent identity unspecified
L5	Biconvex Positive	S-TIH53 — compatible catalog counterpart; patent identity unspecified
L6	Negative Meniscus	PBH21 — compatible catalog counterpart; patent identity unspecified
L7	Positive Meniscus	S-TIL6 — compatible catalog counterpart; patent identity unspecified
L8	Negative Meniscus	TAFD40 — compatible catalog counterpart; patent identity unspecified
L9	Biconvex Positive	S-FPM3 — compatible catalog counterpart; patent identity unspecified
L10	Positive Meniscus	PBH21 — compatible catalog counterpart; patent identity unspecified
L11	Biconcave Negative	S-LAH60 — compatible catalog counterpart; patent identity unspecified
L12	Biconvex Positive	FCD1 — compatible catalog counterpart; patent identity unspecified
L13	Biconvex Positive	FCD1 — compatible catalog counterpart; patent identity unspecified
L14	Biconcave Negative	TAFD65 — compatible catalog counterpart; patent identity unspecified
L15	Neg. Meniscus (2× Asph)	L-LAH85V — compatible catalog counterpart; patent identity unspecified
L16	Biconvex Positive	PBH21 — compatible catalog counterpart; patent identity unspecified