CANON RF 24-105mm f/2.8 L IS USM Z — Optical Cross-Section & Ray Tracing

Home / Lenses / Canon / CANON RF 24-105mm f/2.8 L IS USM ZCANON RF 24-105mm f/2.8 L IS USM ZUS 2024/0192474 A1↗, Numerical Example 4 — Shunji Iwamoto
23 ELEMENTS / 18 GROUPS
f = 24.78–102.06 mm
F/2.9 (constant)
2ω ≈ 82.2–24.0°
3 ASPHERICAL SURFACES (2 GMo + 1 Replica)
Focus MechanismDual-group floating focus: L5 (negative meniscus) and L6 (positive meniscus, aspherical S37) both move toward the image when focusing close (patent ¶0069), driven by two Nano USM motors. The patent publishes no close-focus gaps, so focus travel is not modeled; 0.45 m is Canon's production minimum focus distance.
Optical Elements (23 physical; 24 modeled media)ElementTypeGlass
L1Biconcave NegativeTAFD37A (Hoya catalog equivalent; production supplier unspecified)
L2Biconvex PositiveS-FPM3 (Ohara catalog equivalent; production supplier unspecified)
L3Biconvex PositiveS-LAL18 (Ohara catalog equivalent; production supplier unspecified)
L4Biconvex PositiveS-LAL18 (Ohara catalog equivalent; production supplier unspecified)
L5Negative MeniscusS-LAH58 (Ohara catalog equivalent; production supplier unspecified)
L6Biconcave NegativeS-FPM2 (Ohara catalog equivalent; production supplier unspecified)
L7Biconcave NegativeS-FPL51 (Ohara catalog equivalent; production supplier unspecified)
L8Biconvex PositiveNBFD29 (Hoya catalog equivalent; production supplier unspecified)
L9Biconvex PositiveS-TIH53 (Ohara catalog equivalent; production supplier unspecified)
L10Negative MeniscusS-LAH99 (Ohara catalog equivalent; production supplier unspecified)
L11Biconvex PositiveS-NSL36 (Ohara catalog equivalent; production supplier unspecified)
L12rNeg. Meniscus (1× Asph)Unmatched (source bonded medium 1.59022/30.1; chemistry and process unidentified)
L13Negative MeniscusS-LAH66 (Ohara catalog equivalent; production supplier unspecified)
L14Biconvex PositiveS-FPL51 (Ohara catalog equivalent; production supplier unspecified)
L15Negative MeniscusTAFD37A (Hoya catalog equivalent; production supplier unspecified)
L16Biconvex PositiveS-FPL51 (Ohara catalog equivalent; production supplier unspecified)
L17Biconvex PositiveS-FPL51 (Ohara catalog equivalent; production supplier unspecified)
L18Neg. Meniscus (1× Asph)L-LAH85V (Ohara catalog equivalent; production supplier unspecified)
L19Biconvex PositiveS-BSM14 (Ohara catalog equivalent; production supplier unspecified)
L20Negative MeniscusS-LAL18 (Ohara catalog equivalent; production supplier unspecified)
L21Pos. Meniscus (1× Asph)L-BAL42 (Ohara catalog equivalent; production supplier unspecified)
L22Biconvex PositiveS-TIH6 (Ohara catalog equivalent; production supplier unspecified)
L23Biconcave NegativeS-FSL5 (Ohara catalog equivalent; production supplier unspecified)
L24Negative MeniscusTAFD40 (Hoya catalog equivalent; production supplier unspecified)

Element	Type	Glass
L1	Biconcave Negative	TAFD37A (Hoya catalog equivalent; production supplier unspecified)
L2	Biconvex Positive	S-FPM3 (Ohara catalog equivalent; production supplier unspecified)
L3	Biconvex Positive	S-LAL18 (Ohara catalog equivalent; production supplier unspecified)
L4	Biconvex Positive	S-LAL18 (Ohara catalog equivalent; production supplier unspecified)
L5	Negative Meniscus	S-LAH58 (Ohara catalog equivalent; production supplier unspecified)
L6	Biconcave Negative	S-FPM2 (Ohara catalog equivalent; production supplier unspecified)
L7	Biconcave Negative	S-FPL51 (Ohara catalog equivalent; production supplier unspecified)
L8	Biconvex Positive	NBFD29 (Hoya catalog equivalent; production supplier unspecified)
L9	Biconvex Positive	S-TIH53 (Ohara catalog equivalent; production supplier unspecified)
L10	Negative Meniscus	S-LAH99 (Ohara catalog equivalent; production supplier unspecified)
L11	Biconvex Positive	S-NSL36 (Ohara catalog equivalent; production supplier unspecified)
L12r	Neg. Meniscus (1× Asph)	Unmatched (source bonded medium 1.59022/30.1; chemistry and process unidentified)
L13	Negative Meniscus	S-LAH66 (Ohara catalog equivalent; production supplier unspecified)
L14	Biconvex Positive	S-FPL51 (Ohara catalog equivalent; production supplier unspecified)
L15	Negative Meniscus	TAFD37A (Hoya catalog equivalent; production supplier unspecified)
L16	Biconvex Positive	S-FPL51 (Ohara catalog equivalent; production supplier unspecified)
L17	Biconvex Positive	S-FPL51 (Ohara catalog equivalent; production supplier unspecified)
L18	Neg. Meniscus (1× Asph)	L-LAH85V (Ohara catalog equivalent; production supplier unspecified)
L19	Biconvex Positive	S-BSM14 (Ohara catalog equivalent; production supplier unspecified)
L20	Negative Meniscus	S-LAL18 (Ohara catalog equivalent; production supplier unspecified)
L21	Pos. Meniscus (1× Asph)	L-BAL42 (Ohara catalog equivalent; production supplier unspecified)
L22	Biconvex Positive	S-TIH6 (Ohara catalog equivalent; production supplier unspecified)
L23	Biconcave Negative	S-FSL5 (Ohara catalog equivalent; production supplier unspecified)
L24	Negative Meniscus	TAFD40 (Hoya catalog equivalent; production supplier unspecified)