Nikon AI Zoom-Nikkor 360-1200mm f/11 ED

US 3,743,384 Example I — Nippon Kogaku / Soichi Nakamura

20 elements / 12 groups
360-1200 mm
f/11 constant aperture
Nikon F mount
All-spherical ultra-telephoto zoom

Focus Mechanism

Patent publishes infinity zoom spacings only; production lens focuses to 6 m, but close-focus optical spacings are not disclosed. This file models zoom-only movement.

Optical Elements (20)

ElementTypeGlass
L1Biconvex PositiveUnmatched special low-dispersion glass (486/815; patent quartzite/ED-type)
L2Biconvex PositiveUnmatched special low-dispersion glass (486/815; patent quartzite/ED-type)
L3Biconcave NegativeLaF2 / N-LAF2 class (Schott, 744/449)
L4Positive MeniscusN-SK5 / S-BAL35 class (589/612)
L5Biconvex PositiveSF4 / N-SF4 (Schott, 755/276)
L6Biconcave NegativeN-SK5 / S-BAL35 class (589/612)
L7Biconcave NegativeUnmatched special low-dispersion glass (486/815; patent quartzite/ED-type)
L8Positive MeniscusUnmatched barium crown (589/512; historical BAL7-class)
L9Biconcave NegativeN-BK7 / S-BSL7 class (517/642)
L10Positive MeniscusN-SK16 / S-BSM16 class (620/603)
L11Negative MeniscusUnmatched flint (613/369; catalog identity uncertain)
L12Biconvex PositiveUnmatched special low-dispersion glass (486/815; patent quartzite/ED-type)
L13Negative MeniscusSF4 / N-SF4 (Schott, 755/276)
L14Biconvex PositiveUnmatched crown (515/546; catalog identity uncertain)
L15Biconvex PositiveUnmatched special low-dispersion glass (486/815; patent quartzite/ED-type)
L16Biconcave NegativeLaF2 / N-LAF2 class (Schott, 744/449)
L17Positive MeniscusUnmatched barium flint (639/450; catalog identity uncertain)
L18Biconvex PositiveUnmatched light crown (501/565; catalog identity uncertain)
L19Biconcave NegativeUnmatched high-index crown/flint (744/494; catalog identity uncertain)
L20Biconvex PositiveF5 / S-TIM5 class (Schott/Ohara, 603/380)

Analysis

Detailed analysis available in the interactive viewer above.