Canon Patent: 15-50mm F4-6.3, 17-60mm F2.8-5.6, And Some More Lenses

Canon patent application 2024173039 (Japan, published 12/12/2024) discusses optical formulas for a bunch of full-frame lenses, from ultra-wide to standard.

Patent summary:

The present invention presents a compact zoom lens with exceptional optical performance, a high zoom ratio, and a small size.

In recent years, there has been a growing demand for imaging optical systems that combine high optical performance, a high zoom ratio, and a compact design. These systems are commonly used in imaging devices.

Example 1

• Focal length: 15.20-49.50
• F-number: 4.12-6.45
• Half angle of view: 52.76-23.61
• Image height: 20.00-21.64
• Total length: 124.63-125.93
• Back focus: 15.00

Example 2

• Focal length: 17.20-64.50
• F-number: 4.00-5.60
• Half angle of view: 49.30-18.54
• Image height: 20.00-21.64
• Overall length: 132.16-165.51
• Back Focus: 15.00-21.72

Example 3

• Focal length: 17.22-64.50
• F-number: 2.82-5.60
• Half angle of view: 49.27-18.54
• Image height: 20.00-21.64
• Total length: 138.48-159.38
• Back Focus: 14.69-24.38

More Canon patents are listed here.

[via asobinet]