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We have some very unique lens patterns from Canon. The first lens is 15 to 60 mm f/2.8. This is being developed for Canon RF mount, most importantly the lens has inner zoom mechanism and from the overall details, it look like a part of the Canon L series lens with highest grade optics possible. The 15-60mm F2.8 lens is a very unique focal length, it will be nowadays more accepted than the 24-70mm focal length without a doubt., take a look at the details below

overview

• [Publication number] P2024079936
• [Release date] 2024-06-13
• [Name of invention] Zoom lens, and imaging device and imaging system having the same
• [Application date] 2022-12-01
• [Applicant]
  [Identification number] 000001007
  [Name or company name] Canon Inc.
• A zoom lens that has a high zoom ratio and a large aperture ratio, yet is compact, lightweight, and provides high image quality, and that allows high-speed zoom operation.
• [Background Art]
  [0002]
  There is a demand for a zoom lens that is compact and lightweight throughout its entire system, has excellent correction of chromatic aberration and other aberrations, and has high optical performance. There is also a demand for a zoom lens that has a short focal length at the wide-angle end, a large zoom ratio, a small F-number, a large aperture ratio, and is easy to manufacture. There is also a demand for a zoom lens that allows high-speed zoom operation.
• However
  , the zoom lens described in Patent Document 1 has a tendency to have a large lens diameter due to its small F-number, and the large front lens diameter leads to an increase in size and weight. In addition, if the refractive power of the second lens group is increased in order to reduce the front lens diameter, it becomes difficult to achieve high image quality.
• The present
  invention provides a zoom lens that has a high zoom ratio and a large aperture ratio, yet is compact, lightweight, and provides high image quality, and is capable of high-speed zoom operation.

In addition to the 24-105mm, examples of the inner zoom structure “15-60mm F2.8” and “22-80mm F2.8” are also included. The 15-60mm F2.8 looks very convenient. Details are unclear as to whether these will become the “F2.8 Z” series under consideration in the future, or whether they were born during the development process of the 24-105mm F2.8 in Aqua. (Although there are rumors that other Z series will appear) it is too early to expect their

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More about patent here

source asobi NET