Nikon AI Micro-Nikkor 105mm f/2.8S — Optical Cross-Section & Ray Tracing

Home / Lenses / Nikon / Nikon AI Micro-Nikkor 105mm f/2.8SNikon AI Micro-Nikkor 105mm f/2.8SUS 4,392,724 Example 1 — Hamanishi / Nippon Kogaku
10 elements / 9 groups
f = 105.003 mm
F/2.8
2ω = 23.25°
All-spherical
CRC floating focus to 1:2
Focus MechanismCRC floating focus: G1 and G2 move objectward relative to the fixed rear divergent group G3 while D6 and D11 increase; the diaphragm moves with G2.
Optical Elements (10)ElementTypeGlass
L11Biconvex PositiveTAF1 / TAF105 class (HOYA, 773/496)
L12Positive MeniscusLAF3 class (HOYA, 717/480; S-LAM3 equivalent)
L13Negative MeniscusE-LAF7 / S-LAM7 class (750/350-353)
L21aBiconcave NegativeE-FD8 / S-TIM28 class (689/311-313)
L21bBiconvex PositiveTAC4 class (HOYA, 734/511)
L22Biconvex PositiveLAC13 class (HOYA, 694/533; patent νd = 53.8)
L31Positive MeniscusUnmatched (595/355 vintage flint; near FF5 / S-FTM16 class but higher nd)
L32Biconcave NegativeTAF2 / J-LASF017 class (795/454; patent nd = 1.79668)
L33Biconvex PositiveUnmatched (595/355 vintage flint; near FF5 / S-FTM16 class but higher nd)
L34Negative MeniscusNBFD3 class (HOYA, 805/396)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L11	Biconvex Positive	TAF1 / TAF105 class (HOYA, 773/496)
L12	Positive Meniscus	LAF3 class (HOYA, 717/480; S-LAM3 equivalent)
L13	Negative Meniscus	E-LAF7 / S-LAM7 class (750/350-353)
L21a	Biconcave Negative	E-FD8 / S-TIM28 class (689/311-313)
L21b	Biconvex Positive	TAC4 class (HOYA, 734/511)
L22	Biconvex Positive	LAC13 class (HOYA, 694/533; patent νd = 53.8)
L31	Positive Meniscus	Unmatched (595/355 vintage flint; near FF5 / S-FTM16 class but higher nd)
L32	Biconcave Negative	TAF2 / J-LASF017 class (795/454; patent nd = 1.79668)
L33	Biconvex Positive	Unmatched (595/355 vintage flint; near FF5 / S-FTM16 class but higher nd)
L34	Negative Meniscus	NBFD3 class (HOYA, 805/396)