CANON RF-S 18-45mm f/4.5-6.3 IS STM — Optical Cross-Section & Ray Tracing

Home / Lenses / Canon / CANON RF-S 18-45mm f/4.5-6.3 IS STMCANON RF-S 18-45mm f/4.5-6.3 IS STMJP 2021-86024 A↗ — Yuichi Gyoda
7 ELEMENTS / 7 GROUPS
18–45mm f/4.5–6.3 (marketed)
18.53–43.65mm f/4.56–6.50 (patent)
2 ASPHERICAL ELEMENTS / 4 ASPHERICAL SURFACES
IN-LENS IS / LEAD-SCREW STM
Focus MechanismNO_INTERNAL_RECONSTRUCTION: JP 2021-86024 A Example 2 publishes only infinity-focus zoom spacings and states that B3 moves image-side toward close focus. Canon's 0.20 m AF MFD applies at 18 mm and is retained as product metadata; no finite-focus internal spacing is modeled.
Optical Elements (7 physical)ElementTypeGlass
L1Negative Meniscus639554/639555 crown class (vendor unresolved)
L2Biconcave Negative (2× Asph)Unmatched (nd=1.53110, νd=55.9; vendor unresolved)
L3Positive Meniscus847238 high-index flint class (vendor unresolved)
L4Biconvex Positive697555 lanthanum-crown class (vendor unresolved)
L5Positive Meniscus773496 lanthanum optical-glass class (vendor unresolved)
L6Biconcave Negative847238 high-index flint class (vendor unresolved)
L7Positive Meniscus (2× Asph)Unmatched (nd=1.53110, νd=55.9; vendor unresolved)

Element	Type	Glass
L1	Negative Meniscus	639554/639555 crown class (vendor unresolved)
L2	Biconcave Negative (2× Asph)	Unmatched (nd=1.53110, νd=55.9; vendor unresolved)
L3	Positive Meniscus	847238 high-index flint class (vendor unresolved)
L4	Biconvex Positive	697555 lanthanum-crown class (vendor unresolved)
L5	Positive Meniscus	773496 lanthanum optical-glass class (vendor unresolved)
L6	Biconcave Negative	847238 high-index flint class (vendor unresolved)
L7	Positive Meniscus (2× Asph)	Unmatched (nd=1.53110, νd=55.9; vendor unresolved)