Nikon filed patent application 2011-221421 in Japan for a 24-70mm f/3.5-4.5 full frame lens. This lens only makes sense as a part of a “cheap” full frame body kit. The patent contains several different calculations:
Example #1:
- Focal length: 24.70-68.00
- Aperture: 3.51-4.51
- Omega (half field of view): 42.63-16.87
- Image height: 21.6-21.6
- Overall length: 112.599 – 138.896
- Back focus: 38.818-54.481
Example #2
- Focal length: 24.70-82.50
- Aperture: 3.60-4.60
- Omega (half field of view): 42.62-14.04
- Image height: 21.6-21.6
- Overall length: 121.098 – 158.098
- Back focus: 38.818-58.586
Example #3
- Focal length: 28.80-102.00
- Aperture: 3.63-4.62
- Omega (half field of view): 38.28-9.85
- Image height: 21.6-21.6
- Overall length: 123.531 – 157.844
- Back focus: 38.818-54.339
Example #4
- Focal length: 24.70-87.20
- Aperture: 3.60-5.80
- Omega (half field of view): 42.64-11.49
- Image height: 21.6-21.6
- Overall length: 124.699 – 156.696
- Back focus: 38.819-56.191
Example #5
- Focal length: 22.55-77.20
- Aperture: 3.59-5.78
- Omega (half field of view): 45.22-15.08
- Image height: 21.6-21.6
- Overall length: 126.365 – 166.395
- Back focus: 38.819-68.503
