FUJIFILM FUJINON XF 50mm f/1.0 R WR — Interactive Lens Diagram

Home / Lenses / Fujifilm / FUJIFILM FUJINON XF 50mm f/1.0 R WRFUJIFILM FUJINON XF 50mm f/1.0 R WRUS 2021/0231927 A1 — Example 3
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)ElementTypeGlass
L1aBiconcave NegativeS-FPM3 (Ohara)
L1bBiconvex PositiveED fluorophosphate crown (unidentified)
L1cPositive MeniscusED fluorophosphate crown (unidentified)
L1dPositive MeniscusS-NPH53 (Ohara)
L1ePositive MeniscusLaK (nd=1.788, νd=47.5)
L1fNegative MeniscusNPH-class short flint (nd=1.893, νd=20.4)
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)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1a	Biconcave Negative	S-FPM3 (Ohara)
L1b	Biconvex Positive	ED fluorophosphate crown (unidentified)
L1c	Positive Meniscus	ED fluorophosphate crown (unidentified)
L1d	Positive Meniscus	S-NPH53 (Ohara)
L1e	Positive Meniscus	LaK (nd=1.788, νd=47.5)
L1f	Negative Meniscus	NPH-class short flint (nd=1.893, νd=20.4)
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)