RF24-70 F4, 28-200 F2.8-5.6, 20-60 F2.8-4, 50.4 특허

Canon patent 2024039231 (Japan, published 3/22/2024) discusses optical formulas and methods for four lenses with composite optical elements:
24-70mm f/4
28-200mm f/2.8-5.6
20-60mm f/2.8-4
50mm f/1.4
Example 1
Focal length: 24-67.90
F value: 4.12
Half angle of view: 41.33-17.67
Image height: 19.39-21.64
Total length: 108.50-142.13
Back focus: 20.95-50.49
Example 2
Focal length: 15.30-45.00
F value: 4.12
Half angle of view: 41.68-16.51
Image height: 11.60-13.65
Total length: 83.50
Back focus: 17.67
Example 3
Focal length: 50.03
F value: 1.44
Half angle of view: 23.39
Image height: 21.64
Total length: 113.51
Back focus: 13.51
Example 4
Focal length: 28.40-197.00
F value: 2.90-5.70
Half angle of view: 37.30-6.27
Image height: 18.97-21.64
Total length: 151.14-220.00
Back focus: 13.50-47.04
Example 5
Focal length: 21.00-60.00
F value: 2.90-4.10
Half angle of view: 45.79-19.29
Image height: 18.37-21.62
Total length: 135.70-126.50
Back focus: 22.43
Example 6
Focal length: 390.03-275.02
F value: 2.91-3.08
Half angle of view: 3.21-4.52
Image height: 21.84-21.72
Total length: 347.00
Back focus: 46.20
28-200 기대됩니다.