CANON RF 16-28mm f/2.8 IS STM (patent-family model) — Optical Cross-Section & Ray Tracing

Home / Lenses / Canon / CANON RF 16-28mm f/2.8 IS STM (patent-family model)CANON RF 16-28mm f/2.8 IS STM (patent-family model)JP 2024-101615 A↗ — Shinichiro Saito
16 ELEMENTS / 13 GROUPS
f = 15.49–27.16 mm
F/2.9 (CONSTANT, DESIGN)
2ω ≈ 109.1° (WIDE, UNCORRECTED)
3 ASPHERICAL SURFACES / 2 ELEMENTS
Focus MechanismInner focus by L3 (single negative lens E6) moving toward the object with D10 + D12 conserved; all other groups and the image plane fixed. The patent publishes infinity states only; close spacings are solved paraxially for object distances of 0.250 / 0.213 / 0.200 m from the image plane (Canon MFDs at the ends, interpolated at the middle station).
Optical Elements (16 physical)ElementTypeGlass
E1Neg. Meniscus (1× Asph)M-TAFD307 (HOYA) / D-ZLaF67-25 (CDGM) — 882372 coordinates; moldable-glass families only; supplier unconfirmed
E2Negative MeniscusTAF3D (HOYA) / S-LAH65VS (OHARA) / N-LASF44 (Schott) — 804465 coordinates; supplier unconfirmed
E3Biconcave NegativeFCD1 (HOYA) / N-PK52A (Schott) — 497816 fluorophosphate class; supplier unconfirmed
E4Biconvex PositiveTAFD35 (HOYA) / H-ZLaF4LA (CDGM) — 911352 coordinates; supplier unconfirmed
E5Biconvex PositiveS-LAL7Q (OHARA) / N-LAK7 (Schott) — 652585 coordinates; supplier unconfirmed
E6Negative MeniscusTAF1 (HOYA) / S-LAH66 (OHARA) / N-LAF34 (Schott) — 772496 coordinates; supplier unconfirmed
E7Biconvex PositiveFCD705 class (550755; supplier-neutral spectral proxy)
E8Biconvex PositiveFCD1 (HOYA) / N-PK52A (Schott) — 497816 fluorophosphate class; supplier unconfirmed
E9Negative MeniscusS-LAH63Q (OHARA) / J-LASF013 (HIKARI) — 804396 coordinates; supplier unconfirmed
E10Positive MeniscusFDS90 (HOYA) / S-TIH53 (OHARA) / N-SF57 (Schott) — 847238 coordinates; supplier unconfirmed
E11Biconcave NegativeS-BAM4 (OHARA) / N-BAF4 (Schott) — 606437 coordinates; supplier unconfirmed
E12Biconvex PositiveFCD100 class (437951; supplier-neutral spectral proxy)
E13Biconvex PositiveFCD100 class (437951; supplier-neutral spectral proxy)
E14Biconcave NegativeTAFD5G (HOYA) / S-LAH55V (OHARA) — 835427 coordinates; supplier unconfirmed
E15Neg. Meniscus (2× Asph)M-BACD12 (HOYA) / H-ZK2 (CDGM) — 583595 coordinates; supplier unconfirmed
E16Positive MeniscusFC5 (HOYA) / N-FK5 (Schott) — 487704 coordinates; supplier unconfirmed

Element	Type	Glass
E1	Neg. Meniscus (1× Asph)	M-TAFD307 (HOYA) / D-ZLaF67-25 (CDGM) — 882372 coordinates; moldable-glass families only; supplier unconfirmed
E2	Negative Meniscus	TAF3D (HOYA) / S-LAH65VS (OHARA) / N-LASF44 (Schott) — 804465 coordinates; supplier unconfirmed
E3	Biconcave Negative	FCD1 (HOYA) / N-PK52A (Schott) — 497816 fluorophosphate class; supplier unconfirmed
E4	Biconvex Positive	TAFD35 (HOYA) / H-ZLaF4LA (CDGM) — 911352 coordinates; supplier unconfirmed
E5	Biconvex Positive	S-LAL7Q (OHARA) / N-LAK7 (Schott) — 652585 coordinates; supplier unconfirmed
E6	Negative Meniscus	TAF1 (HOYA) / S-LAH66 (OHARA) / N-LAF34 (Schott) — 772496 coordinates; supplier unconfirmed
E7	Biconvex Positive	FCD705 class (550755; supplier-neutral spectral proxy)
E8	Biconvex Positive	FCD1 (HOYA) / N-PK52A (Schott) — 497816 fluorophosphate class; supplier unconfirmed
E9	Negative Meniscus	S-LAH63Q (OHARA) / J-LASF013 (HIKARI) — 804396 coordinates; supplier unconfirmed
E10	Positive Meniscus	FDS90 (HOYA) / S-TIH53 (OHARA) / N-SF57 (Schott) — 847238 coordinates; supplier unconfirmed
E11	Biconcave Negative	S-BAM4 (OHARA) / N-BAF4 (Schott) — 606437 coordinates; supplier unconfirmed
E12	Biconvex Positive	FCD100 class (437951; supplier-neutral spectral proxy)
E13	Biconvex Positive	FCD100 class (437951; supplier-neutral spectral proxy)
E14	Biconcave Negative	TAFD5G (HOYA) / S-LAH55V (OHARA) — 835427 coordinates; supplier unconfirmed
E15	Neg. Meniscus (2× Asph)	M-BACD12 (HOYA) / H-ZK2 (CDGM) — 583595 coordinates; supplier unconfirmed
E16	Positive Meniscus	FC5 (HOYA) / N-FK5 (Schott) — 487704 coordinates; supplier unconfirmed