NIKON NIKKOR-N 5cm f/1.1 — Optical Cross-Section & Ray Tracing

Home / Lenses / Nikon / NIKON NIKKOR-N 5cm f/1.1NIKON NIKKOR-N 5cm f/1.1US 2,828,671 — Murakami 1958
9 elements / 6 groups
Modified double-Gauss
All-spherical
Scaled 0.5× from f = 100 patent
Focus MechanismUnit focus — entire lens translates; only back focal distance changes
Optical Elements (9)ElementTypeGlass
L1Positive MeniscusK-SK7 (Sumita, 607595)
L2Positive MeniscusK-SK7 (Sumita, 607595)
L3Positive Meniscus770479 — lanthanum crown/flint patent glass (nd=1.77000, νd=47.9; no exact public catalog match)
L4Negative MeniscusS-FTM16 (OHARA, 593353)
L5Biconcave NegativeS-TIM22 (OHARA, 648338)
L6Biconvex PositiveS-LAM3 (OHARA, 717479)
L7Plano-ConvexS-LAM3 (OHARA, 717479)
L8Negative MeniscusE-F1 (HOYA, 626357)
L9Positive MeniscusK-SK18 (Sumita, 639555)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Positive Meniscus	K-SK7 (Sumita, 607595)
L2	Positive Meniscus	K-SK7 (Sumita, 607595)
L3	Positive Meniscus	770479 — lanthanum crown/flint patent glass (nd=1.77000, νd=47.9; no exact public catalog match)
L4	Negative Meniscus	S-FTM16 (OHARA, 593353)
L5	Biconcave Negative	S-TIM22 (OHARA, 648338)
L6	Biconvex Positive	S-LAM3 (OHARA, 717479)
L7	Plano-Convex	S-LAM3 (OHARA, 717479)
L8	Negative Meniscus	E-F1 (HOYA, 626357)
L9	Positive Meniscus	K-SK18 (Sumita, 639555)