NIKON NEW NIKKOR 35mm f/2.8

US 3,874,770 A — Yoshiyuki Shimizu

6 ELEMENTS / 6 GROUPS
MODELED EFL 35.001 mm
F/2.8
62° FIELD
ALL-SPHERICAL

Focus Mechanism

Infinity prescription only. The patent publishes no focusing data, so no focus movement is modelled and no minimum focus distance is specified.

Optical Elements (6 physical)

ElementTypeGlass
L1Negative Meniscus515546 — crown flint, KF3 class (KF3 SUMITA coordinate-compatible; supplier unconfirmed)
L2Positive Meniscus517642 — borosilicate crown, BK7 class (J-BK7A HIKARI / N-BK7 SCHOTT coordinate-compatible; supplier unconfirmed)
L3Biconvex Positive713539 — lanthanum crown, LaK8 class (J-LAK8 HIKARI / LAC8 HOYA coordinate-compatible; supplier unconfirmed)
L4Biconcave Negative717295 — dense flint, SF1 class (J-SF1 HIKARI / SF1 SCHOTT coordinate-compatible; supplier unconfirmed)
L5Positive Meniscus744494 — lanthanum flint (nearest NBF1 HOYA / S-LAM60 OHARA, Δnd −0.0011; supplier unconfirmed)
L6Biconvex Positive620603 — dense barium crown, SK16 class (J-SK16 HIKARI / S-BSM16 OHARA coordinate-compatible; supplier unconfirmed)