NIKON AI AF MICRO-NIKKOR 105mm f/2.8 S

JP H02-19814 A, Example 5 — Keiji Moriyama

9 ELEMENTS / 8 GROUPS
f = 105.000 mm PATENT / 105.001 mm TRACE
f/2.8 MARKETED / F/2.86 DESIGN
2ω = 23.2°
1:1 LIFE SIZE

Focus Mechanism

Published three-block floating focus to 1:1. G1 and G2 move objectward; G2 moves farther. G3F (L7-L8) moves imageward at beta=-0.5 and returns at beta=-1.0; G3R and Bf remain fixed. All three published configurations are exact runtime keyframes; interpolation between them is piecewise linear.

Optical Elements (9 physical)

ElementTypeGlass
L1Positive Meniscus694537 — H-LaK6A (CDGM) coordinate-compatible spectral proxy; production supplier unresolved
L2Positive Meniscus717481 — LAF3 (HOYA) coordinate-compatible spectral proxy; production supplier unresolved
L3Negative Meniscus673322 class (supplier-neutral)
L4Plano-Concave Negative626357 class (supplier-neutral)
L5Plano-Convex Positive694537 — H-LaK6A (CDGM) coordinate-compatible spectral proxy; production supplier unresolved
L6Biconvex Positive694537 — H-LaK6A (CDGM) coordinate-compatible spectral proxy; production supplier unresolved
L7Positive Meniscus805255 class (supplier-neutral)
L8Biconcave Negative805396 — NBFD3 (NIKON) coordinate-compatible spectral proxy; production supplier unresolved
L9Biconvex Positive517641 — J-BK7A (HIKARI) coordinate-compatible spectral proxy; production supplier unresolved