NIKON AF-S TELECONVERTER TC-20E III
2× rear teleconverter for Nikon F
JP 2010-191211 A — Yoko Kimura
7 ELEMENTS / 5 GROUPS | 2× CONVERTER (DESIGN β = 1.97) | 1 ASPHERICAL SURFACE / 1 ELEMENT
A dedicated converter: it mounts only on lenses made to accept it. A teleconverter has no aperture stop of its own, so it is shown attached to a host lens, where the lens's stop stays the system stop and the focal length and f-number both grow by the converter's factor.
Mount it on a lens (24 lenses)
NIKON AF-I NIKKOR 300mm f/2.8 D IF-ED— 300mm f/2.8, PATENT F=293.9647mm / FN=2.9, 11 ELEMENTS / 9 AIR-SPACED CLUSTERSNIKON AF-I NIKKOR 400mm f/2.8 D IF-ED— 10 ELEMENTS / 7 GROUPS, 400mm f/2.8 MARKETED, 392.0066 mm PATENT FNIKON AF-I NIKKOR 600mm f/4 D IF-ED— 9 ELEMENTS / 7 GROUPS, MARKETED 600mm f/4, DESIGN f = 587.9998 mmNIKON AF-S NIKKOR 120-300mm f/2.8 E FL ED SR VR— 25 ELEMENTS / 19 GROUPS, f = 123.6–291.0 mm (patent), F/2.91 (constant)NIKON AF-S NIKKOR 180-400mm f/4 E TC1.4 FL ED VR— TC OUT — EXAMPLE 1, 27 ELEMENTS / 19 GROUPS, 183.6–392.0 mm DESIGN ZOOMNIKON AF-S NIKKOR 200-500mm f/5.6 E ED VR— 19 ELEMENTS / 12 GROUPS, f = 205–487 mm, F/4.62–5.78 (patent); F/5.6 (marketed)NIKON AF-S NIKKOR 300mm f/4 E PF ED VR— 300 mm f/4 (marketed), 16 elements / 10 groups, 1 ED + 1 PFNIKON AF-S NIKKOR 400mm f/2.8 E FL ED VR— 16 ELEMENTS / 12 GROUPS, 2 FLUORITE + 2 ED, 400 mm MARKETED / 391.497 mm MODELEDNIKON AF-S NIKKOR 500mm f/4 E FL ED VR— 16 ELEMENTS / 12 GROUPS, 2 FLUORITE + 3 ED, MODELED f = 489.460 mmNIKON AF-S NIKKOR 500mm f/4 G ED VR— 14 ELEMENTS / 11 GROUPS + PROTECTIVE GLASS, DESIGN f = 489.79 mm, DESIGN F/4.08NIKON AF-S NIKKOR 500mm f/5.6 E PF ED VR— 19 elements / 11 groups, 500 mm f/5.6 marketed, f = 489.704 mm designNIKON AF-S NIKKOR 600mm f/4 E FL ED VR— 16 IMAGING ELEMENTS / 12 GROUPS + PROTECTIVE MENISCUS, 2 FLUORITE / 4 ED (PRODUCTION SPECIFICATION), 600mm f/4 (MARKETED)NIKON AF-S NIKKOR 70-200mm f/2.8 E FL ED VR— 22 ELEMENTS / 18 GROUPS, f = 70–200 mm (design 71.5–196.0 mm), F/2.8 (design F/2.85–2.90)NIKON AF-S NIKKOR 70-200mm f/2.8 G ED VR II— 70-200 mm f/2.8 FX telephoto zoom, Patent design: f = 71.40-196.00 mm, FNO = 2.89, 21 elements / 16 groups; 7 ED elementsNIKON AF-S NIKKOR 70-200mm f/4 G ED VR— 20 ELEMENTS / 14 GROUPS, 71.39–194.00 mm DESIGN EFL, f/4.10 MODELEDNIKON AF-S NIKKOR 80-400mm f/4.5-5.6 G ED VR— 20 ELEMENTS / 12 GROUPS, f = 80–400 mm (design 81.6–392.0 mm), F/4.5–5.6NIKON AF-S NIKKOR 800mm f/5.6 E FL ED VR— 20 LENS ELEMENTS / 13 GROUPS + PROTECTIVE GLASS, PATENT DESIGN EFL ≈ 779.921 mm, DESIGN f/5.658NIKON AF-S VR MICRO-NIKKOR 105mm f/2.8 G IF-ED— 14 elements / 11 groups, Patent example; compatible glass counterparts, All-sphericalNIKON AF-S VR ZOOM-NIKKOR 200-400mm f/4 G IF-ED— 24 ELEMENTS / 17 GROUPS, 200-400mm f/4 (MARKETED), 204-392mm F/4.08 (EXAMPLE 1)NIKON AF-S VR ZOOM-NIKKOR 70-200mm f/2.8 G IF-ED— 21 ELEMENTS / 15 GROUPS, 70-200mm MARKETED; 71.4-196.0mm DESIGN, f/2.8 MARKETED; f/2.88 MODELEDNIKON AI AF-S NIKKOR 300mm f/2.8 D IF-ED— 11 ELEMENTS / 8 GROUPS, 3 ED ELEMENTS, 300mm f/2.8 (MARKETED)NIKON AI AF-S NIKKOR 500mm f/4 D IF-ED— 11 ELEMENTS / 9 GROUPS, 3 ED ELEMENTS, PATENT F=490.0 mm; EFL≈489.961 mmNIKON AI AF-S NIKKOR 600mm f/4 D IF-ED II— 10 ELEMENTS / 7 GROUPS, 600 mm f/4 (marketed), EFL ≈ 587.793 mm (design)NIKON AI AF-S ZOOM-NIKKOR 80-200mm f/2.8 D IF-ED— 18 ELEMENTS / 14 GROUPS, MARKETED 80-200mm f/2.8, DESIGN EFL ≈ 81.55-196.00mm