FUJIFILM FUJINON XF 50mm f/1.0 R WR — Optical Cross-Section & Ray Tracing

Home / Lenses / Fujifilm / FUJIFILM FUJINON XF 50mm f/1.0 R WRFUJIFILM FUJINON XF 50mm f/1.0 R WRUS 2021/0231927 A1↗ — Daiki Kawamura, Michio Cho
12 elements / 9 groups
1 aspherical element (2 aspherical surfaces)
2 ED elements
Inner focus (G2 moves)
f = 49.549 mm  FNo = 1.03  2ω = 31.4°
Focus MechanismInner focus — G2 (5 elements, 2 cemented doublets) moves 4.44 mm toward object from ∞ to 0.7 m. G1 and stop remain stationary.
Optical Elements (12 physical)ElementTypeGlass
L1aBiconcave NegativeS-TIL2 (OHARA)
L1bBiconvex Positive593686 ED class; J-PSKH1 catalog spectral proxy (patent dPgF retained)
L1cPositive Meniscus593686 ED class; J-PSKH1 catalog spectral proxy (patent dPgF retained)
L1dPositive MeniscusS-NPH3 (OHARA)
L1ePositive MeniscusLaK (nd=1.788, νd=47.5)
L1fNegative Meniscus893204 NPH class; S-NPH4 catalog spectral proxy (production supplier unspecified)
L1gNegative MeniscusSF/NPH (nd=1.808, νd=22.8)
L2aNeg. Meniscus (2× Asph)NbF/SF (nd=1.689, νd=31.2)
L2bBiconvex PositiveLaF (nd=1.883, νd=39.2)
L2cBiconcave NegativeNbF (nd=1.699, νd=30.1)
L2dBiconvex PositiveLaF (nd=1.883, νd=39.2)
L2eNegative MeniscusTiF/F (nd=1.620, νd=36.4)

Element	Type	Glass
L1a	Biconcave Negative	S-TIL2 (OHARA)
L1b	Biconvex Positive	593686 ED class; J-PSKH1 catalog spectral proxy (patent dPgF retained)
L1c	Positive Meniscus	593686 ED class; J-PSKH1 catalog spectral proxy (patent dPgF retained)
L1d	Positive Meniscus	S-NPH3 (OHARA)
L1e	Positive Meniscus	LaK (nd=1.788, νd=47.5)
L1f	Negative Meniscus	893204 NPH class; S-NPH4 catalog spectral proxy (production supplier unspecified)
L1g	Negative Meniscus	SF/NPH (nd=1.808, νd=22.8)
L2a	Neg. Meniscus (2× Asph)	NbF/SF (nd=1.689, νd=31.2)
L2b	Biconvex Positive	LaF (nd=1.883, νd=39.2)
L2c	Biconcave Negative	NbF (nd=1.699, νd=30.1)
L2d	Biconvex Positive	LaF (nd=1.883, νd=39.2)
L2e	Negative Meniscus	TiF/F (nd=1.620, νd=36.4)