SONY FE 28-70mm f/3.5-5.6 OSS — Optical Cross-Section & Ray Tracing

Home / Lenses / Sony / SONY FE 28-70mm f/3.5-5.6 OSSSONY FE 28-70mm f/3.5-5.6 OSSUS 2015/0077859 A1 Example 4 — Kanetaka / Nagamatsu, Sony
28-70mm f/3.5-5.6
9 elements / 8 groups
3 aspherical elements / 5 aspherical surfaces
1 ED element
Optical SteadyShot production lens
Focus MechanismInner focus by the single negative third group (G8). The patent gives infinity spacings only; close-focus spacings are paraxial finite-conjugate solves to the official endpoint MFDs, with mid-zoom MFD interpolated.
Optical Elements (9)ElementTypeGlass
G1Negative MeniscusS-LAH55V (OHARA) / TAFD5G class, 835427
G2Biconcave NegativeS-LAM2 / LaF2 class, 744447-448
G3Positive MeniscusE-FDS1 (HOYA) / N-SF66 class, 923209
G4Biconvex Positive (2× Asph)L-BAL42 class (OHARA low-Tg / moldable barium crown), 583594
G5Biconvex Positive EDFCD1 (HOYA) / S-FPL51 class, 497816
G6Biconcave NegativeE-FD7 (HOYA) / S-TIM27 class, 640346
G7Biconvex Positive (2× Asph)L-BAL42 class (OHARA low-Tg / moldable barium crown), 583594
G8Biconcave Negative (1× Asph)L-LAL13 / S-LAL13 class (OHARA), 694532
G9Positive MeniscusE-LAF7 (HOYA) / H-LaF4 class, 750350
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
G1	Negative Meniscus	S-LAH55V (OHARA) / TAFD5G class, 835427
G2	Biconcave Negative	S-LAM2 / LaF2 class, 744447-448
G3	Positive Meniscus	E-FDS1 (HOYA) / N-SF66 class, 923209
G4	Biconvex Positive (2× Asph)	L-BAL42 class (OHARA low-Tg / moldable barium crown), 583594
G5	Biconvex Positive ED	FCD1 (HOYA) / S-FPL51 class, 497816
G6	Biconcave Negative	E-FD7 (HOYA) / S-TIM27 class, 640346
G7	Biconvex Positive (2× Asph)	L-BAL42 class (OHARA low-Tg / moldable barium crown), 583594
G8	Biconcave Negative (1× Asph)	L-LAL13 / S-LAL13 class (OHARA), 694532
G9	Positive Meniscus	E-LAF7 (HOYA) / H-LaF4 class, 750350