SAMYANG AF 35-150mm f/2-2.8 FE / L — Optical Cross-Section & Ray Tracing

Home / Lenses / Samyang / SAMYANG AF 35-150mm f/2-2.8 FE / LSAMYANG AF 35-150mm f/2-2.8 FE / LUS 2025/0231383 A1↗ — Ju Yeon Jo
21 physical elements / 18 groups
Patent EFL 35.989-146.969 mm
Marketed f/2-2.8; patent F2.07-F2.90
2 ASP + 1 H-ASP + 3 HR + 6 ED class
Internal focus: single negative Gm3 element
Focus MechanismInternal focusing by single negative group Gm3 (L17); D31 increases and D33 decreases.
Optical Elements (21 physical; 22 modeled media)ElementTypeGlass
L1Negative MeniscusHoya NBFD15 / 806-333 dense flint class
L2Positive MeniscusS-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L3Positive MeniscusS-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L4rNeg. Meniscus (1× Asph, resin layer)UV-curable hybrid aspherical resin (patent nd=1.517, νd=52.0)
L4gNegative MeniscusS-LAH66 (OHARA) / TAF1 (Hoya) lanthanum-flint class
L5Biconcave NegativeS-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L6Positive MeniscusHoya NBFD15 / 806-333 dense flint class
L7Biconvex PositiveS-TIH1 (OHARA) / N-SF1 (Schott) dense flint class
L8Negative MeniscusM-PCD51 (Hoya) / H-ZPK3 (CDGM) phosphate-crown class
L9Biconvex PositiveHoya NBFD15 / 806-333 dense flint class
L10Positive MeniscusHoya E-FDS1 / 923-209 ultra-high-index dense flint class
L11Biconvex PositiveS-NSL3 (OHARA) / E-C3 (Hoya) light-crown class
L12Positive MeniscusS-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L13Biconvex PositiveS-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L14Biconcave NegativeS-LAH99 (OHARA) / TAFD55 (Hoya) ultra-high-index lanthanum flint class
L15Positive MeniscusN-PSK53A (Schott) / PCD4 (Hoya) / S-PHM52 (OHARA) phosphate-crown class
L16Biconvex Positive (2× Asph)NBFD13 / M-NBFD130 (Hoya) / D-ZLaF81 class high-index lanthanum flint
L17Negative MeniscusS-FTM16 (OHARA) light-flint class
L18Biconvex PositiveFDS20-W (Hoya) / 870-200 dense flint class
L19Biconcave NegativeHoya E-FDS1 / 923-209 ultra-high-index dense flint class
L20Biconvex PositiveS-NPH1 (OHARA) / FD225 (Hoya) dense phosphate-flint class
L21Negative Meniscus (2× Asph)K-SKLD200 / K-SKLD120(M) neighborhood, proprietary crown class

Element	Type	Glass
L1	Negative Meniscus	Hoya NBFD15 / 806-333 dense flint class
L2	Positive Meniscus	S-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L3	Positive Meniscus	S-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L4r	Neg. Meniscus (1× Asph, resin layer)	UV-curable hybrid aspherical resin (patent nd=1.517, νd=52.0)
L4g	Negative Meniscus	S-LAH66 (OHARA) / TAF1 (Hoya) lanthanum-flint class
L5	Biconcave Negative	S-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L6	Positive Meniscus	Hoya NBFD15 / 806-333 dense flint class
L7	Biconvex Positive	S-TIH1 (OHARA) / N-SF1 (Schott) dense flint class
L8	Negative Meniscus	M-PCD51 (Hoya) / H-ZPK3 (CDGM) phosphate-crown class
L9	Biconvex Positive	Hoya NBFD15 / 806-333 dense flint class
L10	Positive Meniscus	Hoya E-FDS1 / 923-209 ultra-high-index dense flint class
L11	Biconvex Positive	S-NSL3 (OHARA) / E-C3 (Hoya) light-crown class
L12	Positive Meniscus	S-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L13	Biconvex Positive	S-FPL51 (OHARA) / FCD1 (Hoya) ED fluorophosphate class
L14	Biconcave Negative	S-LAH99 (OHARA) / TAFD55 (Hoya) ultra-high-index lanthanum flint class
L15	Positive Meniscus	N-PSK53A (Schott) / PCD4 (Hoya) / S-PHM52 (OHARA) phosphate-crown class
L16	Biconvex Positive (2× Asph)	NBFD13 / M-NBFD130 (Hoya) / D-ZLaF81 class high-index lanthanum flint
L17	Negative Meniscus	S-FTM16 (OHARA) light-flint class
L18	Biconvex Positive	FDS20-W (Hoya) / 870-200 dense flint class
L19	Biconcave Negative	Hoya E-FDS1 / 923-209 ultra-high-index dense flint class
L20	Biconvex Positive	S-NPH1 (OHARA) / FD225 (Hoya) dense phosphate-flint class
L21	Negative Meniscus (2× Asph)	K-SKLD200 / K-SKLD120(M) neighborhood, proprietary crown class