Canon Patent: 24-300mm F4-5.6, 24-400mm F4-5.6 And 20-240mm F4-6.3 Lenses

Eos R With Aps-c

Here is a new Canon patent application for what appears to be a bunch of slow zoom lenses. Kit lenses?

Canon patent application 2024005834 (Japan, published 01/17/2024) discusses optical formulas for three zoom lenses:

  • 24-300mm F4-5.6
  • 24-400mm F4-5.6
  • 20-240mm F4-6.3

From the patent literature:

  • [Problem] To obtain a high-performance zoom lens with a high zoom ratio while the entire system is compact.
  • [Background Art] In recent years, as an imaging optical system used in an imaging device, a small zoom lens with a high zoom ratio (high zoom ratio), high optical performance over the entire zoom range, and a short overall lens length has been used. That is what is required.
  • However, in the zoom lens disclosed in Patent Document 1, the Abbe number of the positive lens included in the first lens group is small, and when the zoom ratio is increased, the longitudinal chromatic aberration becomes large, especially at the telephoto end.
  • Accordingly, an object of the present invention is to provide a zoom lens having a high zoom ratio and high optical performance, while the entire system is small.

Example 1

  • Focal length: 24.72-291
  • F value: 4.12-5.77
  • Half angle of view: 37.35-4.25
  • Image height: 21.64
  • Total length: 175-258.9
  • Back focus: 13.81-68.61

Example 2

  • Focal length: 24.72-390
  • F value: 4.12-5.77
  • Half angle of view: 37.35-3.18
  • Image height: 21.64
  • Total length: 180-300.09
  • Back focus: 14.63-81.63

Example 3

  • Focal length: 20.6-240
  • F value: 4.12-6.3
  • Half angle of view: 42.48-5.15
  • Image height: 21.64
  • Total length: 174.99-284.99
  • Back focus: 14.63-81.63

[via asobinet]

Canon Displays A Concept VR/3D Lens For APS-C At CES 2024

Ces 2024

Canon put a concept lens on display at CES 2024. The lens appears to be for virtual reality (VR) and/or 3D applications.

Along with the lenses, Canon also displayed a PowerShot V-series camera for VR. Here the gear that has been put on display:

  • APS-C 3D VR lens
  • APS-C 3D stereoscopic lens
  • 360°/180° 3D VR camera

Canon already offers the RF 5.2mm F2.8L Dual Lens Fisheye lens for this kind of applications. It appears Canon is even more committed to VR. The images on top and below come from Weibo.

[via asobinet]

Canon Patent: RF-S 15-45mm F3.5-6.3 Lens For APS-C Imaging Sensors

Canon Patent

And here is another Canon patent application for the RF-S mount. Canon patent 2023182958 (Japan, published 2023-12-27) discusses optical formulas for a lens for the RF-S mount, 15-45mm F3.5-6.3.

From the patent literature:

  • An object of the present invention is to provide a zoom lens with good optical performance over the entire zoom range.
  • [Background Art] Conventionally, a lens has a first lens group with a negative refractive power and a second lens group with a positive refractive power, which are arranged in order from the object side to the image side, and includes a focal length in the standard range. Zoom lenses are known (see Patent Documents 1 and 2).
  • However, in the zoom lens disclosed in Patent Document 1, the entire lens system is large and it is not possible to achieve sufficiently high image quality. Furthermore, in the zoom lens disclosed in Patent Document 2, various aberrations such as spherical aberration and coma aberration are not sufficiently corrected.
  • An object of the present invention is to provide a zoom lens with good optical performance over the entire zoom range.

Example 1

  • Focal length: 15.36-43.10
  • F value: 3.60-6.44
  • Half angle of view: 35.76-17.59
  • Total length: 76.36-73.51
  • Back focus: 10.45

Example 2

  • Focal length: 18.45-43.10
  • F value: 4.10-6.44
  • Half angle of view: 31.58-17.59
  • Total length: 80.15-79.38
  • Back focus: 13.47-33.69

Example 3

  • Focal length: 16.23-43.10
  • F value: 3.61-6.44
  • Half angle of view: 32.27-17.59
  • Total length: 88.10-88.68
  • Back focus: 10.87

[via asobinet]

Canon Patent: 20-120mm F4 And 18-100mm F4 For RF-S Mount

Canon Patent

A new Canon patent application (well, not really new) for two lenses for the RF-S mount.

Canon patent application 2023182926 (Japan, published 2023-12-27) discusses optical formulas for two RF-S mount lenses:

  • 20-120mm F4
  • 18-100mm F4

From the patent literature:

  • An object of the present invention is to provide a fixed-length zoom lens having a high zoom magnification and high optical performance over the entire zoom range.
  • BACKGROUND ART
    Fixed-length zoom lenses are known in which the overall length of the lens does not change during zooming. Such a zoom lens is suitable for video shooting and the like because the center of gravity does not change much during zooming. In recent years, zoom lenses have been required to have high zoom magnification and high optical performance over the entire zoom range for video applications.
  • However, although the zoom lens described in Patent Document 1 is superior in that there are fewer lens groups that move during zooming and focusing, improvements in optical performance are required as the resolution of sensors has increased in recent years
  • On the other hand, in the zoom lens described in Patent Document 2, high optical performance is obtained over the entire zoom range by increasing the number of lenses in each lens group, but an even higher zoom magnification is required.
  • The present invention provides a full-length fixed zoom lens having a high zoom magnification and high optical performance over the entire zoom range.

Example 1

  • Focal length: 20.02-119.95
  • F value: 4.08
  • Half angle of view: 34.40-6.31
  • Image height: 12.33-13.66
  • Total length: 165.00
  • Back focus: 13.54

Example 2

  • Focal length: 20.01-134.95
  • F value: 4.08
  • Half angle of view: 34.29-5.61
  • Image height: 12.33-13.66
  • Total length: 168.51-168.50
  • Back focus: 13.82

Example 3

  • Focal length: 18.41-101.96
  • F value: 4.08
  • Half angle of view: 36.59-7.42
  • Image height: 12.33-13.66
  • Total length: 146.50146.49
  • Back focus: 13.77

[via asobinet]

Save Up To $75 On Topaz Labs AI Software (Photo AI & Video AI)

Topaz Labs

There are a few days left for this sale by Topaz Labs. The sale ends December 31, 2023.

You get $50 off Photo AI and $75 off Video AI. Trail version available, click here to learn more.

More selected deals:

Canon Patent: Automatic Bracketing For Tilt-shift Lenses

Canon Patent

This Canon patent appears to be related to a tilt-shift lens that supports automatic control and allows multiple shots to be taken while automatically setting values. Cool.

Canon patent application 2023179295 (Japan. published 19/12/2023) discusses methods and optical formulas for a what appears to be a fully automated tilt-shift lens.

From the patent literature:

  • An object of the present invention is to easily obtain photographed images with various tilt amounts, shift amounts, and revolving amounts without a user having to make difficult manual adjustments.
  • Background Art
    Focusing can be achieved by tilting the optical system of the optical system with respect to the normal to the imaging surface of the image sensor or by shifting the optical axis parallel to the imaging surface. Lens devices are used that allow photography to be performed by changing the distance range and perspective to suit the subject. Furthermore, there is also a lens device that allows the optical system to rotate (revolving) while being tilted or shifted.
  • Patent Document 1 discloses a lens device that allows a user to tilt or shift an optical system by manually rotating an operation knob.
  • However, in the lens device disclosed in Patent Document 1, the user needs to adjust the tilt amount and shift amount by operating the operation knob while looking through the finder or viewing the live view image displayed on the monitor. be. For users who are not familiar with this operation, it is difficult to adjust the amount of tilt and shift appropriately, and it is also difficult to obtain the desired image because it is difficult to visualize the effect of tilt and shift on the captured image. It is.
  • The present invention provides an imaging device that allows a user to easily obtain captured images with various tilt amounts, shift amounts, and revolving amounts without having to make difficult manual adjustments.
  • An imaging device as one aspect of the present invention performs imaging through an optical system that can be driven by an actuator for at least one movement among tilt, shift, and revolution. The imaging device includes a camera control means that controls an actuator to cause the imaging device to take multiple images while driving the at least one movement by a predetermined amount, and a setting device that allows a user to set a predetermined amount. It is characterized by having the following .
  • A control method as another aspect of the present invention is applied to an imaging device that performs imaging through an optical system that can be driven by an actuator for at least one of tilting, shifting, and rotating movements. The control method includes the steps of: controlling an actuator to cause the imaging device to take multiple images while driving the at least one movement by a predetermined amount; and allowing a user to set the predetermined amount .
  • Through the above processing, the camera microcomputer 206 determines that at least one of tilting, shifting, and rotating operations on the attached interchangeable lens 100 is possible, and allows the user to make settings regarding bracket photography. In bracket photography, photography is performed a predetermined number of times while changing the drive position of tilt, shift, or revolution by a predetermined amount.
  • The overall width setting mode is a first mode in which the user can set the total driving amount (overall width) of tilting, shifting, or revolving from the start to the end of a series of bracket photography. The overall width is a drive amount that can be set within the entire tilt drive range, the entire shift drive range, and the entire revolving drive range. This overall width setting mode is suitable for finding a setting close to the user’s wishes by performing multiple shootings while roughly changing the drive position of tilt, shift, or revolving.
  • The step width setting mode is a second mode in which the user can set the step width (predetermined amount) of tilt, shift, or revolving to be changed for each photograph. In this step width setting mode, the user has almost found the desired setting, and then takes multiple shots selected by the user while subtly changing the drive position near that setting to finally find the setting that meets the user’s wishes. This mode is suitable for selecting captured images.

More Canon patents are listed here.

[via asobinet]