KODAK EKTAR 52mm f/1.5 — Optical Cross-Section & Ray Tracing

Home / Lenses / Kodak / KODAK EKTAR 52mm f/1.5KODAK EKTAR 52mm f/1.5US 2,397,565↗ — Willy Schade
7 ELEMENTS / 4 GROUPS
f = 52.0207 mm (scaled design)
f/1.5
ALL-SPHERICAL
Focus MechanismNO_INTERNAL_RECONSTRUCTION: Example 1 is fixed at infinity; closeFocusM=1e15 is a UI sentinel, not product MFD.
Optical Elements (7 physical)ElementTypeGlass
IPositive MeniscusK-SK18 catalog proxy; 638555 SK18 class (supplier unconfirmed)
IINegative MeniscusUnmatched (vintage barium-flint class, N_D=1.617, V=38.5)
IIIPositive MeniscusK-SK18 catalog proxy; 638555 SK18 class (supplier unconfirmed)
IVBiconcave NegativeSF5 catalog proxy; 673322 dense-flint class (supplier unconfirmed)
VBiconvex PositiveS-BAH10 catalog proxy; 670472 BAF10 class (supplier unconfirmed)
VIBiconcave NegativeS-TIL2 catalog proxy; 541472 light-flint class (supplier unconfirmed)
VIIBiconvex PositiveTAC4 catalog proxy; 734511 lanthanum-crown class (supplier unconfirmed)

Element	Type	Glass
I	Positive Meniscus	K-SK18 catalog proxy; 638555 SK18 class (supplier unconfirmed)
II	Negative Meniscus	Unmatched (vintage barium-flint class, N_D=1.617, V=38.5)
III	Positive Meniscus	K-SK18 catalog proxy; 638555 SK18 class (supplier unconfirmed)
IV	Biconcave Negative	SF5 catalog proxy; 673322 dense-flint class (supplier unconfirmed)
V	Biconvex Positive	S-BAH10 catalog proxy; 670472 BAF10 class (supplier unconfirmed)
VI	Biconcave Negative	S-TIL2 catalog proxy; 541472 light-flint class (supplier unconfirmed)
VII	Biconvex Positive	TAC4 catalog proxy; 734511 lanthanum-crown class (supplier unconfirmed)