NIKON Z TELECONVERTER TC-1.4x
1.4× rear teleconverter for Nikon Z
JP 2021-189311 A — Katsuhiro Takamoto, Yasushi Yamamoto, Hiroshi Yabumoto
6 ELEMENTS / 4 GROUPS | 1.4× REAR CONVERTER | 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 (5 lenses)
NIKON NIKKOR Z 100-400mm f/4.5-5.6 VR S— 25 elements / 20 groups, Patent nd; Abbe numbers inferred, All sphericalNIKON NIKKOR Z 180-600mm f/5.6-6.3 VR— 25 ELEMENTS / 17 GROUPS, 180-600mm (DESIGN 185.0086-582.1636mm), f/5.6-6.3 (DESIGN f/5.8014-6.5296)NIKON NIKKOR Z 70-200mm f/2.8 VR S— 21 ELEMENTS / 18 GROUPS, f = 71.5–196 mm, F/2.88NIKON NIKKOR Z 70-200mm f/2.8 VR S II— 18 ELEMENTS / 16 GROUPS, f = 71.4–196.0 mm, F/2.89–2.91NIKON NIKKOR Z 800mm f/6.3 VR S— 22 ELEMENTS / 14 GROUPS, PATENT f = 779.99933 mm, PATENT F/6.41999