Canon Filed A Patent For Fish Eye 8-15mm F4, 16mm F2.5, and 17mm F2.5 Lenses

By Louis Ferreira | Published: January 28, 2025


Canon filed a patent for Fish Eye 8-15mm F4, 16mm F2.5, and 17mm F2.5 lenses.

overview

  • [Publication number] JP2025-12993 (P2025-12993A)
  • [Release date] January 24, 2025 (2025.1.24)
  • [Name of invention] Lens device and imaging device
  • [Application date] July 14, 2023 (2023.7.14)
  • [Applicant]
    [Identification number] 000001007
    [Name or company name] Canon Inc.
  • By adding another optical system to a master optical system, distortion is suppressed while avoiding an increase in the size of the entire optical system.
  • 2. Description of the Related Art
    [0002]
    As a method for obtaining a wide-angle lens with low distortion from a fisheye lens, Patent Document 1 discloses a method for converting the projection method of a fisheye lens to a general projection method by placing an aspherical dome-shaped lens with negative refractive power on the object side of the fisheye lens (master optical system). Patent Document 2 discloses a method for changing the projection method by exchanging an intermediate portion between the object side and image side of the optical system.
  • Placing a dome lens on the object side of a fisheye lens as in Patent Document 1 leads to an increase in size of the entire optical system. Furthermore
    , the method of replacing an intermediate part of the optical system as in Patent Document 2 requires replacement work and the configuration to enable replacement becomes complicated.
  • The present invention
    provides a lens device that can suppress distortion while avoiding an increase in the size of the entire optical system by adding another optical system to the master optical system.


Example 1-A

  • Focal length: 8.25-15.48
  • F-number: 4.12
  • Half angle of view: 53.50-54.42
  • Image height: 11.15-21.64
  • Overall length: 105.00
  • Back focus: 25.50-40.85

Example 1-B

  • Focal length: 15.41
  • F-number: 4.12
  • Half angle of view: 54.54
  • Image height: 21.64
  • Overall length: 105.00
  • Back Focus: 18.25


Example 3-A

  • Focal length: 16.11
  • F-number: 2.50
  • Half angle of view: 53.33
  • Image height: 21.64
  • Overall length: 81.19
  • Back focal length: 22.76

Example 3-B

  • Focal length: 18.69
  • F-number: 2.90
  • Half angle of view: 49.17
  • Image height: 21.64
  • Overall length: 88.32
  • Back focal length: 9.91


Example 4-A

  • Focal length: 17.67
  • F-number: 2.50
  • Half angle of view: 50.76
  • Image height: 21.64
  • Overall length: 100.05
  • Back Focus: 41.09

Example 4-B

  • Focal length: 16.71
  • F-number: 2.36
  • Half angle of view: 52.32
  • Image height: 21.64
  • Overall length: 100.06
  • Back focal length: 9.61

Follow Canonaddict on Facebook, X/Twitter, Instagram, and YouTube

via asobinet

Posted in Patents | Tagged , , , , , | Comments closed

Canon Filed A Patent For Internal Zoom Wide-Angle 16-30mm F2.8, 15-35mm F2.8, and 14-28mm F2.8 Lenses With Electronic Control

By Louis Ferreira | Published: January 27, 2025


Canon filed a patent for internal zoom wide-angle 16-30mm F2.8, 15-35mm F2.8, and 14-28mm F2.8 lenses with electronic controls.

overview

  • [Publication number] JP2025-11796 (P2025-11796A)
  • [Release date] January 24, 2025 (2025.1.24)
  • [Name of invention] Zoom lens and imaging device
  • [Application date] July 12, 2023 (2023.7.12)
  • [Applicant]
    [Identification number] 000001007
    [Name or company name] Canon Inc.
  • A zoom lens having high optical performance is provided.
  • 2. Description of the Related Art
    [0002]
    Patent Document 1 discloses a zoom lens that moves the first lens group toward the object side and the second lens group toward the object side when focusing, thereby reducing the change in the angle of view. Patent Document 2 discloses a zoom lens that has two focusing groups, a focusing group and a final lens group within the first lens group, and switches the group that moves when focusing according to the zoom position.
  • [0004] In the zoom lens disclosed in Patent Document 1, the correction is made by zooming using a zoom cam, so correction is difficult in a configuration that does not allow motorized zooming, such as an interchangeable lens. In the zoom lens disclosed
    in Patent Document 2, the lens in the first lens group, which has a large lens diameter and is heavy, is moved, so it is difficult to motorize it, and it is also difficult to reduce the change in the angle of view over the entire zoom range. For this reason, it is difficult to realize a zoom lens with high optical performance with the configurations disclosed in Patent Documents 1 and 2.
  • During zooming, the first lens group B1 and the seventh lens group B7 are fixed, and the second lens group B2 to the sixth lens group B6 move toward the object side. The zoom lens 1a of this embodiment has the following features: since the overall length does not change during zooming, there is little change in the center of gravity, which is advantageous for dust resistance; furthermore, the zoom torque is low, which makes it easy to accommodate a later-installed electric zoom attachment; and it is therefore suitable for use in video photography.
  • The image height indicates both the paraxial image height and the real image height, and it is assumed here that image distortion caused by distortion aberration is corrected by processing the captured image.


Example 1

  • Focal length: 16.40-30.00
  • F-number: 2.88
  • Half angle of view: 52.84-35.80
  • Image height: 21.64
  • Real image height: 18.61-21.42
  • Total length: 158.40
  • Back Focus: 17.19


Example 2

  • Focal length: 15.40-34.50
  • F-number: 2.88
  • Half angle of view: 54.55-32.09
  • Image height: 21.64
  • Real image height: 18.61-22.06
  • Total length: 179.35
  • Back focus: 20.01-25.54


Example 3

  • Focal length: 14.42-27.40
  • F-number: 2.88
  • Half angle of view: 56.31-38.30
  • Image height: 21.64
  • Real image height: 18.61-22.06
  • Total length: 154.50
  • Back focus: 13.95-18.90

Follow Canonaddict on Facebook, X/Twitter, Instagram, and YouTube

via asobinet

Posted in Patents | Tagged , , , , , | Comments closed

New Canon EOS APS-C Camera Specs Leaked

By Louis Ferreira | Published: January 25, 2025


Some Canon EOS APS-C camera specs were leaked on weibo for an upcoming camera with an unknown name at this time.

[Canon APS-C mirrorless camera rumor!] It is said that Canon will release a new APS-C camera in the first half of the year, and its specifications have been leaked:

the new camera uses a 24.1-megapixel stacked CMOS sensor;
with DIGIC X processor + DIGIC accelerator;
supports 6K RAW and 120-fps 4K video shooting;
a new body design;
high-speed continuous shooting of 30 frames per second;
supports C-Log2/C-Log3;
equipped with a full-size HDMI interface;
expected price of US$1,500;

Follow Canonaddict on Facebook, X/Twitter, Instagram, and YouTube

via weibo

Posted in Patents | Comments closed

Canon EF400mm F2.8L IS III USM Discontinued

By Louis Ferreira | Published: January 24, 2025


Canon EF400mm F2.8L IS III USM: B&H Photo / Amazon / Adorama

The Canon EF400mm F2.8L IS III USM is being marked as discontinued overseas, but there are a few left in stock in the United States. B&H Photo and Adorama have an unspecified amount left, while Amazon has 3 lenses. If you want this lens new this might be your last chance.

  • Kitamura Camera: On sale now
  • Map Camera: Discontinued products, in stock
  • Bic Camera: On sale now
  • Yodobashi Camera: Discontinued
  • Nikon Direct: On sale now

Follow Canonaddict on Facebook, X/Twitter, Instagram, and YouTube

via asobinet

Posted in Canon Lenses | Tagged | Comments closed

Canon RF16-28mm F2.8 IS STM Announced

By Louis Ferreira | Published: January 23, 2025


Canon RF16-28mm F2.8 IS STM: B&H Photo / Amazon / Adorama

Canon U.S.A. Announces the New RF16-28mm F2.8 IS STM Lens: Elevating Content Creation for the Next Generation

MELVILLE, NY, January 22, 2025 – Canon U.S.A., Inc., a leader in digital imaging solutions, is excited to unveil the new RF16-28mm F2.8 IS STM lens, joining the Canon RF28–70mm F2.8 STM as a more affordable f/2.8 zoom option for Canon mirrorless users. Designed for modern content creators, this lens delivers outstanding image quality, portability, and versatility—ideal for use across both photo and video.

Whether filming cinematic video or shooting intimate photo portraits, the RF16-28mm F2.8 IS STM provides sharp details and vibrant colors to elevate content with ease. Its compact, durable design makes it the perfect companion for creators working in both urban environments and remote locations, offering performance typically reserved for larger lenses.

Engineered for professionals and beginners alike, the RF16-28mm F2.8 IS STM combines fast autofocus, smooth aperture control, and outstanding optics. With the wide f/2.8 constant maximum aperture and ultra wide-angle zoom coverage, it captures high-resolution, crisp footage, while minimizing technical challenges, allowing creators to expand their creative vision. The lens also features focus breathing correction, which smooths video transitions during focus changes—an essential asset for filmmakers aiming for a polished, professional look in evolving shooting environments.

Additionally, the lens incorporates advanced stabilization systems for both stills and video. Coordinated control with Peripheral IS minimizes distortion at the edges of wide-angle shots, providing clear, crisp images across the entire frame. For video, coordinated control with Movie Digital IS enhances stabilization, making it perfect for handheld or highspeed shots, keeping footage steady and smooth even when walking or shooting in changing settings.

As demand for dynamic, high-quality content continues to grow, the RF16-28mm F2.8 IS STM stands out as an indispensable tool for photo and video content creators, landscape and travel enthusiasts, and everyday photographers alike—and the flexibility to meet the needs of today’s fast-paced digital world.

Pricing and Availability
The Canon RF16-28mm F2.8 IS STM Lens is available and currently scheduled to ship on February 11, 2025, for an estimated retail price of $1,149.00*. For additional information, please visit usa.canon.com.

Posted in Canon Lenses | Tagged , | Comments closed

Canon Is Developing A New 410MP CMOS 35mm Full-Frame Sensor

By Louis Ferreira | Published: January 22, 2025


Canon U.S.A., Inc. today announced that its parent company, Canon Inc. announced that it has developed a CMOS sensor with 410 megapixels (24,592 x 16,704 pixels), which is the largest number1 of pixels ever achieved in a 35mm full-frame sensor. It will be available in both RGB and monochrome versions. This sensor is expected to be used in applications that demand extreme resolution in various markets including surveillance, medicine, and industrial imaging.

The newly developed CMOS sensor features a resolution equivalent to 24K (198 times greater than Full HD, and 12 times greater than 8K). This enables users to crop any part of the image captured by this sensor and enlarge it significantly while maintaining high resolution. While many CMOS sensors with a super-high pixel count are medium-format or larger, this extreme resolution sensor is compacted into a 35mm full-frame format. This allows it to be used in combination with lenses for full-frame sensors and is expected to contribute to the miniaturization of shooting equipment.

As data readout of a CMOS sensor tends to take longer as the number of pixels increases, achieving a CMOS sensor with a super-high pixel count requires advanced signal processing technology. This newly developed sensor employs a back-illuminated stacked formation in which the pixel segment and signal processing segment are interlayered and also includes a redesigned circuitry pattern. As a result, the sensor is capable of achieving a super-high readout speed of 3,280 megapixels per second, delivering video at 8 frames per second2.

The monochrome version features a “four-pixel binning” function that virtually treats four adjoining pixels as one, thereby improving sensitivity and making it possible to capture brighter images. When this function is in use, the sensor can capture 100-megapixel video at 24 frames per second.

By leveraging the technology it has accumulated over many years as a leading imaging company, Canon has developed breakthrough products including CMOS sensors with super-high pixel count and ultra-sensitivity, and SPAD sensors, which detect faint traces of light even in dark areas. Canon will continue to advance its technology and contribute to the transformation and further development of society.

via photorumors

Posted in Press Release | Comments closed