LEICA APO-SUMMICRON 43mm f/2 ASPH.

US 2024/0241349 A1 EXAMPLE 1 — PANASONIC / NISHIOKA

11 ELEMENTS / 8 GROUPS
f ≈ 41.7 mm
F/2.06
2ω ≈ 55.0°
7 ASPHERICAL SURFACES (4 ELEMENTS)

Focus Mechanism

Floating inner focus: G2 (L6–L7) and G4 (L10) translate toward object. Constant overall length.

Optical Elements (11)

ElementTypeGlass
L1Biconcave NegativeS-TIM22 (OHARA)
L2Biconvex PositiveS-NPH4 (OHARA)
L3Biconvex Positive593/686 (PK crown, uncertain ID)
L4Biconcave NegativeS-TIH6 (OHARA)
L5Biconvex Positive (2× Asph)587/590 (HOYA FDS family / PGM)
L6Biconcave Negative (1× Asph)S-TIM28 / L-TIM28 (OHARA)
L7Biconvex PositiveS-LAH99 / TAFD33 (OHARA)
L8Positive MeniscusS-LAH95 (OHARA)
L9Biconcave NegativeS-TIM35 (OHARA)
L10Biconvex Positive (2× Asph)S-FPM3 / L-FPM3 (OHARA)
L11Neg. Meniscus (2× Asph)587/590 (HOYA FDS family / PGM)

Analysis

Detailed analysis available in the interactive viewer above.