MINOLTA MD ZOOM 24-35mm f/3.5

JP S56-158314 A — Akiyoshi Nakamura

10 ELEMENTS / 10 GROUPS
f ≈ 24.6–34.1 mm
F/3.5
2ω ≈ 84.2°–65.3°
ALL SPHERICAL

Focus Mechanism

Front group I (L1–L4) extends as a unit by about 4.1 mm while group II and the image plane stay fixed. Close-focus spacings are a paraxial reconstruction for 0.3 m from the film plane, not patent data.

Optical Elements (10 physical)

ElementTypeGlass
L1Positive MeniscusS-BAL35 (OHARA)
L2Negative MeniscusS-LAH53 (OHARA) class — Close (patent 805410, Δnd +0.0011)
L3Biconcave NegativeS-LAH53 (OHARA) class — Close (patent 805410, Δnd +0.0011)
L4Positive MeniscusS-TIH6 (OHARA)
L5Positive MeniscusLAC13 (HOYA)
L6Biconvex PositiveBAF10 (HOYA)
L7Positive MeniscusBACD4 (HOYA) — Close (613585)
L8Biconcave NegativeS-TIH6 (OHARA)
L9Positive MeniscusE-C3 (HOYA)
L10Biconvex PositiveUnmatched (526521 crown/light-flint boundary; nearest HOYA CF2 at Δnd +0.0005, Δνd −1.0)