Canon Patent For Built-In Tilting Viewfinder

Canon Patent

A new Canon Patent application describing a built-in tilting viewfinder which should also tale less space for implementation.

Canon patent application 2023104712 (Japan, published 7/28/2023) describes methods and technology for a tiltable viewfinder for an EOS R series camera body. From the patent literature:

[Title of the invention] Viewfinder unit, imaging device

Canon Inc. An object of the present invention is to suppress an increase in the size of an electronic device while securing a large rotation angle of a finder portion.

Description of the Related Art

Conventionally, a viewfinder unit provided in an electronic device such as an imaging device is known. For example, in an electronic device having a viewfinder unit such as an electronic viewfinder, the viewfinder unit is arranged on the upper part of the back side of the electronic device body. The finder section of the finder unit can be slid out from the main body of the electronic device, and the finder section can be tilted and rotated upward from the pulled out state, thereby increasing the degree of freedom in shooting posture.

However, in Patent Document 1, since the distance between the contact position of the pair of leaf springs with respect to the base plate and the rotation axis of the holder is long, the contact position moves so as to draw a large arc locus during rotation. . If the finder section rotates excessively, the leaf spring section will come off the fixed plate, so there is a restriction on the rotation angle of the finder section. On the other hand, if an attempt is made to design the rotation angle to be large, it is necessary to enlarge the fixing plate, which leads to an increase in the size of the imaging apparatus main body.

SUMMARY OF THE INVENTION

It is an object of the present invention to suppress an increase in the size of an electronic device while ensuring a large rotation angle of a viewfinder.

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

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Canon Patent: RF 135mm f/1.8L IS USM Lens For The EOS R Camera System

Canon Patent

And yet another Canon patent application for an RF-mount lens.

Canon patent application 2023099390 (Japan, published 7/13/2023) discusses optical formulas for what appears to be an RF 135mm f/1.8L IS USM lens.

From the patent literature:

Optical System and Imaging Device Having the Same

An object of the present invention is to provide an optical system equipped with an anti-vibration group that achieves both miniaturization and high anti-vibration performance, and an imaging apparatus having the optical system.
Telephoto lenses equipped with anti-vibration groups are required to achieve both miniaturization and high anti-vibration performance . In the telephoto lens equipped with the anti-vibration group of Patent Document 1, the anti-vibration performance is ensured by arranging the anti-vibration group at a position slightly away from the image plane position toward the object side, but it is difficult to reduce the size.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide an optical system equipped with a vibration reduction group that achieves both miniaturization and high vibration reduction performance, and an imaging apparatus having the optical system.

Example:

  • Focal length: 130.98
  • F-value: 1.85
  • Half angle of view: 9.38
  • Image height: 21.64
  • Total length: 147.99
  • Back focus: 17.45

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

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Canon Patent: RF 100-300mm f/2.8L IS USM Lens

Canon Patent

A new Canon patent application was spotted.

Canon patent application 2023099388 (Japan, published 7/13/2023) discusses optical formulas for what appears to be an RF 100-300mm f/2.8L IS USM lens for the EOS R camera system. From the patent literature:

Title of Invention

A zoom lens, an imaging device having the same, and an imaging system.

An object of the present invention is to provide a lightweight zoom lens that has high optical performance over the entire zoom range, and an imaging device and an imaging system having the zoom lens.

Description of the Related Art

In recent years, zoom lenses used in imaging apparatuses are required to have high optical performance over the entire zoom range and to be lightweight. In order to meet these requirements, the zoom lens has a first lens group with positive refractive power, a second lens group with negative refractive power, and a subsequent group including a plurality of lens groups, arranged in order from the object side to the image side. Lenses have been proposed (see Patent Documents 1 and 2).

A large-aperture telephoto zoom lens having a long focal length and a small F-number tends to have a large lens diameter, which tends to cause an increase in weight. In order to reduce the weight of the zoom lens, it is effective to increase the positive refractive power of the first lens group and reduce the lens diameters of the lens groups included in the subsequent group. However, if the refractive power of the first lens group is made too strong, it becomes difficult to correct spherical aberration, axial chromatic aberration, and lateral chromatic aberration, especially at the telephoto end.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a lightweight zoom lens that has high optical performance over the entire zoom range, and an imaging apparatus and imaging system having the zoom lens. Focusing is performed by moving the fifth lens unit L5 and the sixth lens unit L6 along different trajectories . Specifically, the fifth lens unit L5 and the sixth lens unit L6 move toward the image side when focusing from an infinite object to a close object.

Example 1

  • Focal length: 103.00-292.00
  • F-value: 2.90
  • Half angle of view: 11.86-4.24
  • Image height: 21.64
  • Total length: 333.61
  • Back focus: 31.93

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

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Canon Patent: RF 9-18mm f/4 And RF 10-18mm f/4 Lenses

Canon Patent

Another Canon patent application that was published yesterday.

Canon patent application 2023099389 (Japan, published 7/13/2023) discusses optical formulas and methods for two ultra wide zoom lenses.

From the patent literature:

A compact and lightweight zoom lens that has a wide angle of view and high optical performance over the entire zoom range is provided.

Description of the Related Art

In recent years, zoom lenses used in imaging apparatuses are required to have a wide angle of view and high optical performance as imaging apparatuses have become more sophisticated. Further, as a zoom lens having a wide angle of view at the wide-angle end, a negative lead type zoom lens in which a lens group having a negative refractive power precedes the zoom lens is known.
However, in the zoom lens disclosed in Patent Document 1, the focal length of the first lens group is set to be small in order to widen the angle of view. . In addition, the back focus and the refractive power of the first lens group are not appropriate, and it is difficult to further reduce the diameter of the front lens and shorten the total length. The zoom lens disclosed in Patent Document 2 has a short back focus and a refractive power arrangement suitable for shortening the total length. However, the lens groups succeeding the first lens group all have positive refractive power, and it is difficult to narrow the position of the front principal point toward the first lens group when viewed as the entire succeeding group. is difficult.
In order to obtain a compact and lightweight zoom lens that has high optical performance over the entire zoom range while achieving a wide angle, the refractive power and lens configuration of the first lens group, and the lens groups following the first lens group It is important to set the refracting power and placement position of the lens appropriately.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a compact and lightweight zoom lens that has a wide angle of view and high optical performance over the entire zoom range, and an imaging apparatus having the zoom lens.

Example 1

  • Focal length: 9.27-17.46
  • F-value: 4.12
  • Half angle of view: 63.98-51.10
  • Image height: 19.00-21.64
  • Overall length: 108.47-100.80
  • Back focus: 15.71-23.00

Example 2

  • Focal length: 10.01-17.46
  • F-value: 4.12
  • Half angle of view: 62.21-51.10
  • Image height: 19.00-21.64
  • Overall length: 106.74-99.55
  • Back focus: 12.36

More Canon patents are listed here.

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Canon Patent: RF 200mm f/2 IS Lens For EOS R System

Canon Patent

And here we have another Canon patent published today.

Canon patent application 2023099385 (Japan, published 7/13/2023) discusses optical formulas for a RF 200mm f/2 IS lens.

From the patent literature:

To provide an optical system having a plurality of focusing groups and anti-vibration groups that can be made compact and lightweight in addition to excellent optical performance.

Description of the Related Art

In a telephoto lens equipped with a plurality of focusing groups that move during focusing from infinity to the closest object and a vibration reduction group for correcting image blur, in addition to good optical performance, There is a demand for miniaturization and weight reduction of the entire lens system.
The present invention provides an optical system having a plurality of focusing groups and anti-vibration groups, which can be reduced in size and weight in addition to excellent optical performance.

Example 1

  • Focal length: 195.00
  • F-value: 2.05
  • Half angle of view: 6.33
  • Image height: 21.64
  • Overall length: 184.49
  • Back focus: 22.35

More Canon patents are listed here.

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Canon Patent: RF 20-60mm f/4.5-6.3 Lens For EOS R System

Canon Patent

And here we have another Canon patent application published today.

Canon patent application 2023099391 (Japan, published 7/13/2023) discusses optical formulas and methods for an RF 20-60mm f/4.5-6.3 lens for the EOS R system. Is this a possible new kit lens?

From the patent literature:

A zoom lens and an imaging device having the same

A compact, lightweight zoom lens with high optical performance and an imaging device and an imaging system having the zoom lens are provided.

Description of the Related Art

A zoom lens used in an imaging apparatus is required to have a wide angle of view, a small size, and a light weight. As a wide-angle zoom lens, a so-called negative lead type zoom lens is known, in which a lens group having a negative refractive power is arranged closest to the object side.
However, in the zoom lens disclosed in Patent Document 1, although the size and weight of the zoom lens have been reduced, various aberrations have not been satisfactorily corrected, resulting in insufficient optical performance. [0007]The present invention provides a zoom lens that is compact and lightweight and has high optical performance, and an imaging apparatus and an imaging system having the zoom lens.

Example 1

  • Focal Length: 24.71-48.53
  • F-value: 4.63-6.48
  • Half angle of view: 36.23-2308
  • Image height: 18.10-20.68
  • Overall length: 105.60-99.03
  • Back focus: 16.94-37.19

Example 2

  • Focal Length: 20.91-48.50
  • F-value: 4.63-6.49
  • Half angle of view: 41.17-23.03
  • Image height: 18.02-20.61
  • Total length: 120.00-100.66
  • Back focus: 10.49-31.34

Example 3

  • Focal Length: 20.61-58.50
  • F-value: 4.64-6.49
  • Half angle of view: 41.17-19.41
  • Image height: 18.02-20.61
  • Overall length: 135.00-125.50
  • Back focus: 10.49-11.70

More Canon patents are listed here.

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