Canon Patent: RF-S 14-30mm f/4-6.3 And RF 20-50mm f/4-5.6

Canon Patent

Here is a new Canon patent application, one for a RF-S and one for a RF lens.

Canon patent application 2024072459 (Japan, 5/28/2024) discusses optical formulas for two RF-mount lenses:

  • RF-S 14-30mm f/4-6.3 [for APS-C imaging sensors]
  • RF 20-50mm f/4-5.6

From the patent literature:

  • The present invention provides a zoom lens that is both compact and lightweight and has high image quality, has a short focal length at the wide-angle end, is easy to manufacture, is inexpensive, and allows high-speed zoom operations.
  • BACKGROUND ART
    Zoom lenses used in imaging devices are required to be small and lightweight, have various aberrations including chromatic aberration well corrected, and have high optical performance. Additionally, there is a demand for a zoom lens that has a short focal length at the wide-angle end, is easy to manufacture, and is inexpensive. Furthermore, there is a demand for a zoom lens that allows high-speed zoom operations.
  • In order to provide such a zoom lens, the arrangement of the aspherical lens is important. If an aspherical lens is placed in the second lens group, which is placed adjacent to the image side of the first lens group closest to the object and has a high axial ray height, the required precision of the aspherical lens will be high, making it difficult to manufacture. As the power increases, it becomes difficult to provide an inexpensive zoom lens. On the other hand, if an aspherical lens is not disposed in the second lens group, it will be difficult to suppress aberrations generated in the second lens group, making it difficult to achieve high image quality. Furthermore, in order to provide a zoom lens that can realize high-speed zoom operations, it is effective to fix the first lens group with a large lens diameter and move only the lens group with a small lens diameter. However, by fixing the first lens group closest to the object, aberration correction deteriorates and it becomes difficult to achieve high image quality.
  • Patent Document 1 describes a compact and lightweight zoom lens that includes a first lens group with negative refractive power, a second lens group with positive refractive power, and a second lens group with negative refractive power, which are arranged in order from the object side. A zoom lens has been proposed that includes a third lens group and a fourth lens group with positive refractive power. The first lens group is fixed relative to the image plane during zooming.
  • The present invention provides a zoom lens that is both compact and lightweight and has high image quality, has a short focal length at the wide-angle end, is easy and inexpensive to manufacture, and allows high-speed zoom operations.

Example 1

  • Focal length: 14.40-29.10
  • F value: 4.10-6.40
  • Half angle of view: 43.4-25.1
  • Total length: 75.06
  • Back focus: 11.78

Example 3

  • Focal length: 12.40-29.10
  • F value: 4.10-6.40
  • Half angle of view: 47.9-25.2
  • Total length: 82.67-82.67
  • Back focus: 11.71

Example 3

  • Focal length: 20.60-48.50
  • F value: 4.10-5.88
  • Half angle of view: 46.4-24.2
  • Total length: 106.52-106.52
  • Back focus: 19.41

More Canon patents are listed here.

[via asobinet]

These Might Be Images Of The Upcoming Canon EOS R1 (spotted in the wild)

Canon Eos R1

A set of four pictures emerged from the Interweb. They show a camera that might be the upcoming Canon EOS R1.

The images never show the moniker of the camera, and it seems this is on purpose. It’s all a bit fishy, so take it with a grain of salt. A big one. The pictures were allegedly taken at the GP of Monaco.

Here are the images:

[via Federico Basile]

Canon Announces Development Of Canon EOS R1 Flagship

Canon Eos R1

We expected it, and it came. The development announcement of the Canon EOS R1.

B&H Photo will notify you as soon as it is available for preorder.

Canon press release:

CANON DEVELOPS EOS R1 AS FIRST FLAGSHIP MODEL FOR EOS R SYSTEM

New Image Processing System Further Improves AF and Image Quality

MELVILLE, N.Y., May 15, 2024 – Canon U.S.A., Inc. today announced that its parent company, Canon Inc. announced today that it is currently developing the EOS R1, a full-frame mirrorless camera, as the first flagship model for the EOS R SYSTEM equipped with an RF mount and is aiming for a 2024 release.

The EOS R1 is a mirrorless camera geared toward professionals that brings together Canon’s cutting-edge technology and combines top-class performance with the strong durability and high reliability sought in a flagship model. This camera will dramatically improve1 the performance of both still images and video and meet the high requirements of professionals on the frontlines of a wide range of fields including sports, news reporting, and video production.

This camera employs the newly developed image processor DIGIC Accelerator in addition to the pre-existing processor DIGIC X. The new image processing system, composed of these processors and a new CMOS sensor, enables large volumes of data to be processed at high speeds and delivers never-before-seen advancements in Auto Focus (AF) and other functions.

By combining the new image processing system and deep learning technology to an advanced degree, Canon has achieved high-speed and high-accuracy subject recognition. For example, subject tracking accuracy has been improved so that in team sporting events where multiple subjects intersect, the target subject can continually be tracked even if another player passes directly in front of them. In addition, the AF “Action Priority” function recognizes subject movement by rapidly analyzing the subject’s status. In moments during a sports game when it is difficult to predict what will happen next, this function automatically determines the player performing a certain action, such as shooting a ball, as the main subject and instantly shifts the AF frame, thereby helping to capture decisive moments of gameplay.

The combination of the new image processing system and deep learning technology will help to improve image quality. Canon implements the image noise reduction function, which has been previously developed and improved as part of the software for PCs, as a camera function to further improve image quality and contribute to user creativity.

Canon is working on field tests for this camera and will support capturing definitive and impactful moments at international sporting events to be held in the future.

Going forward, Canon will continue to expand the EOS R SYSTEM lineup of fascinating cameras and RF lenses, thereby continuing to meet the demands of a wide range of users and contribute to the development of photography and video culture.

About Canon U.S.A. Inc.
Canon U.S.A., Inc., is a leading provider of consumer, business-to-business, and industrial digital imaging solutions to the United States and to Latin America and the Caribbean markets. With approximately $29.4 billion in global revenue, its parent company, Canon Inc. as of 2023 has ranked in the top-five overall in U.S. patents granted for 38 consecutive years. Canon U.S.A. is dedicated to its Kyosei philosophy of social and environmental responsibility. To learn more about Canon, visit us at www.usa.canon.com and connect with us on LinkedIn at https://www.linkedin.com/company/canonusa.# # #

1 In comparison to EOS R3 (released in November 2021)

† Based on weekly patent counts issued by United States Patent and Trademark Office. Specifications and availability are subject to change without notice.

Canon Patent: 200-800mm f/6.3-9 And 150-600mm f/6.3-9 Lenses

Canon Patent

A new Canon patent application for two telephoto lenses.

Canon patent application 2024062200 (japan, published 5/9/2024) discusses optical formulas for two telephoto lenses for the RF mount:

  • 200-800mm f/6.3-9
  • 150-600mm f/6.3-9

From the patent literature:

  • An object of the present invention is to provide a zoom lens that has high optical performance, a high zoom ratio, and is small and lightweight.
  • [Background Art] In recent years, imaging optical systems used in imaging devices are required to be small and lightweight zoom lenses that have a long focal length at the telephoto end and have high optical performance over the entire zoom range.
  • According to the present invention, it is possible to provide a zoom lens that has high optical performance, has a high zoom ratio, and is small and lightweight.

[via asobinet]