PANASONIC LUMIX S 24-105mm f/4 MACRO O.I.S.

JP 2020-118738 A — Hiroaki Suzuki, Yuka Kudo, Yoshiaki Kurioka

16 ELEMENTS / 13 GROUPS
DESIGN f = 25.003-100.569 mm
MODELED F/4.119
ω = 40.98°-12.06°
8 ASPHERICAL SURFACES
0.300 m / 0.493× TELE MODEL

Focus Mechanism

CONSTRAINED_RECONSTRUCTION: G4 (L14) translates imageward by 1.594494 / 4.601741 / 13.669691 mm from infinity to a 0.300 m object-to-image state at wide / middle / tele. The adjacent D27 and D29 gaps change equally and oppositely. The normalized tele state gives 0.4926× versus the patent's rounded 0.5× checkpoint.

Optical Elements (16 physical)

ElementTypeGlass
L1Negative Meniscus, convex to object923209 — high-index flint class
L2Biconvex Positive729547 — lanthanum crown class
L3Positive Meniscus, convex to object729547 — lanthanum crown class
L4Negative Meniscus, convex to object773496 — lanthanum crown class
L5Negative Meniscus (2× Asph), convex to image808409 — molded high-index glass class
L6Biconvex Positive921240 — dense flint class
L7Negative Meniscus, convex to image773496 — lanthanum crown class
L8Positive Meniscus (2× Asph), convex to objectUnmatched (688311; M-FD80 / S-TIM28 / J-SF8 class)
L9Negative Meniscus, convex to object871407 — high-index lanthanum glass class
L10Positive Meniscus, convex to object497816 — ED fluorophosphate crown class
L11Negative Meniscus, convex to object847238 — dense flint class
L12Biconvex Positive437951 — UED fluorophosphate class
L13Biconvex Positive (2× Asph)553718 — aspherical ED glass class (M-FCD500 near match)
L14Biconcave Negative (2× Asph)553718 — aspherical ED glass class (M-FCD500 near match)
L15Biconcave Negative497816 — ED fluorophosphate crown class
L16Positive Meniscus, convex to object900374 — high-index lanthanum glass class