Nikon Patents: Z 200mm f/4 & Z 90-140mm f/4.5-5.6 VR Lenses
Nikon has filed two new Z-mount lens patents for the NIKKOR Z 200mm f/4 S & NIKKOR Z 90-140mm f/4.5-5.6 VR Lenses, which are designed for Nikon full frame mirrorless cameras. Take a look at the patent details below:
Nikon NIKKOR Z 200mm f/4 S Lens
[Publication Number] JP 2021-92640 (P2021-92640A)
[Publication date] June 17, 2021
[Title of the Invention] A method for manufacturing a teleconverter lens, an optical system, an optical device, and a teleconverter lens.
The use of a diffractive lens makes it more compact, lightweight and flexible. The lens would be 23cm long. The patent also includes a 1.4x converter to reach the 280mm focal lenght.
ML
Focal length 196.000
F value 4.025
Image height 21.70
full length 232.433
BF 32.547
Example 1
Composite focal length 274.123
Synthetic F value 4.025
Image height 21.70
full length 247.986
BF 10.055
Example 3
Composite focal length 391.997
Synthetic F value 5.756
Image height 21.70
full length 261.766
BF 9.156
Nikon NIKKOR Z 90-140mm f/4.5-5.6 VR Lens
[Publication Number] JP 2021-92807 (P2021-92807A)
[Publication date] June 17, 2021
[Title of Invention] A variable magnification optical system, an optical device, and a method for manufacturing a variable magnification optical system.
Example 1
Focal length 93.38-138.92
F value 4.64-5.84
Angle of view 26.52-17.42
Image height 21.60
full length 209.56
BF 38.52-64.02
Maximum shooting magnification -0.675 — 1.0
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Read more: Best Lenses for Nikon Z6 II & Best Lenses for Nikon Z7 II.
Via: asobinet