NIKON AI ZOOM-NIKKOR 50-300mm f/4.5 ED — Optical Cross-Section & Ray Tracing

Home / Lenses / Nikon / NIKON AI ZOOM-NIKKOR 50-300mm f/4.5 EDNIKON AI ZOOM-NIKKOR 50-300mm f/4.5 EDUS 4,189,213 A↗ — Yutaka Iizuka
15 ELEMENTS / 5 PATENT GROUPS
50-300mm
f/4.5
ED
ALL-SPHERICAL
Focus MechanismCONSTRAINED_RECONSTRUCTION: the patent specifies first-group focusing toward the object but gives no close-focus spacing row. Nikon specifies 2.5 m MFD from the focal plane. Code solving moves G1 objectward by 13.184948 / 13.175210 / 13.174286 mm at 50 / 122.458 / 295.2 mm; the sequential model represents this as the corresponding increase in d5 only, leaving G2-G5 and the image plane fixed relative to one another.
Optical Elements (15 physical)ElementTypeGlass
L1Negative MeniscusH-LaF4 catalog equivalent (patent 750350; production supplier unspecified)
L2Biconvex PositiveJ-FKH1 catalog equivalent (patent 500819; production supplier unspecified)
L3Positive MeniscusJ-PKH1 catalog equivalent (patent 520701; production supplier unspecified)
L4Negative MeniscusLAC8 catalog equivalent (patent 713539; production supplier unspecified)
L5Positive MeniscusS-BAH32 catalog equivalent (patent 670392; production supplier unspecified)
L6Biconcave NegativeN-SK11 catalog equivalent (patent 564608; production supplier unspecified)
L7Positive MeniscusJ-SF6 catalog equivalent (patent 805255; production supplier unspecified)
L8Biconvex PositiveJ-PKH1 catalog equivalent (patent 520701; production supplier unspecified)
L9Biconvex PositiveJ-PKH1 catalog equivalent (patent 520701; production supplier unspecified)
L10Biconvex PositiveJ-PKH1 catalog equivalent (patent 520701; production supplier unspecified)
L11Negative MeniscusJ-SF6 catalog equivalent (patent 805255; production supplier unspecified)
L12Biconcave NegativeLAC8 catalog equivalent (patent 713539; production supplier unspecified)
L13Positive MeniscusS-TIL26 catalog equivalent (patent 567428; production supplier unspecified)
L14Negative MeniscusJ-LASFH2 catalog equivalent (patent 767466; production supplier unspecified)
L15Biconvex PositiveS-NSL3 catalog equivalent (patent 518590; production supplier unspecified)

Element	Type	Glass
L1	Negative Meniscus	H-LaF4 catalog equivalent (patent 750350; production supplier unspecified)
L2	Biconvex Positive	J-FKH1 catalog equivalent (patent 500819; production supplier unspecified)
L3	Positive Meniscus	J-PKH1 catalog equivalent (patent 520701; production supplier unspecified)
L4	Negative Meniscus	LAC8 catalog equivalent (patent 713539; production supplier unspecified)
L5	Positive Meniscus	S-BAH32 catalog equivalent (patent 670392; production supplier unspecified)
L6	Biconcave Negative	N-SK11 catalog equivalent (patent 564608; production supplier unspecified)
L7	Positive Meniscus	J-SF6 catalog equivalent (patent 805255; production supplier unspecified)
L8	Biconvex Positive	J-PKH1 catalog equivalent (patent 520701; production supplier unspecified)
L9	Biconvex Positive	J-PKH1 catalog equivalent (patent 520701; production supplier unspecified)
L10	Biconvex Positive	J-PKH1 catalog equivalent (patent 520701; production supplier unspecified)
L11	Negative Meniscus	J-SF6 catalog equivalent (patent 805255; production supplier unspecified)
L12	Biconcave Negative	LAC8 catalog equivalent (patent 713539; production supplier unspecified)
L13	Positive Meniscus	S-TIL26 catalog equivalent (patent 567428; production supplier unspecified)
L14	Negative Meniscus	J-LASFH2 catalog equivalent (patent 767466; production supplier unspecified)
L15	Biconvex Positive	S-NSL3 catalog equivalent (patent 518590; production supplier unspecified)