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

Canon Patent
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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.

[via asobinet]

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

Canon Patent
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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.

[via asobinet]

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

Canon Patent
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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.

[via asobinet]

Canon Patent: RF 100mm f/1.4, RF 85mm f/1.4 And More Prime Lenses

Canon Patent
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Here is a new Canon patent, the first of four that have been published today.

Canon patent application 2023099386 (Japan, published 7/13/2023) discusses optical formulas for a bunch of fast prime lenses.

From the patent literature:

To provide an optical system capable of satisfactorily correcting aberrations over a wide range of object distances while achieving miniaturization of a focus lens group.

Description of the Related Art

In recent years, an optical system used in an imaging apparatus has achieved a reduction in the size of the entire lens diameter of a focus lens group. It is required to be able to satisfactorily correct surface curvature and the like. As an optical system that satisfies these requirements, Patent Document 1 discloses a positive refractive power first lens group, a negative refractive power focus lens group, and a positive refractive power lens group, which are arranged in order from the object side to the image side. is disclosed having a focus lens group of .
However, in the optical system described in Patent Document 1, when the aperture of the optical system is increased, the focal length of the focus lens group having a positive refractive power and the second optical system arranged on the image side of the focus lens group The focal length of the 4 lens group is not properly set. For this reason, in the optical system described in Patent Document 1, it is difficult to suppress aberration fluctuations during focusing when the optical system has a large aperture.

SUMMARY OF THE INVENTION

The present invention provides an optical system capable of satisfactorily correcting aberrations over a wide range of object distances while achieving a compact focus lens group.

Example 1

  • Focal length: 82.50
  • F-value: 1.46
  • Half angle of view: 14.69
  • Image height: 21.64
  • Overall length: 112.50
  • Back focus: 13.00

Example 2

  • Focal length: 72.10
  • F-value: 1.46
  • Half angle of view: 16.70
  • Image height: 21.64
  • Overall length: 108.50
  • Back focus: 12.99

Example 3

  • Focal length: 97.50
  • F-value: 1.46
  • Half angle of view: 12.51
  • Image height: 21.64
  • Overall length: 125.50
  • Back focus: 13.00

Example 4

  • Focal length: 82.50
  • F-value: 1.24
  • Half angle of view: 14.69
  • Image height: 21.64
  • Overall length: 135.50
  • Back focus: 15.03

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

[via asobinet]

The Canon EOS R1 Might Have A New Kind Of EVF

Nab 2023 Canon Eos R5 Mark Ii Canon Eos R8 CP+ 2024 Mark Ii Canon EOS Rf 24-50mm R6 Mark Ii Rf Mount Eos R6 Mark Ii Rf 300mm Rf 35mm Canon Eos R100 Rf 24mm F/1.8 Rf-s Canon Eos R7 Eos R100 Canon High Resolution Eos R R10 Eos C5 Canon Canon Eos R1 Eos R5c Canon Rf 16mm Rf 35mm F/1.2L EF Lenses Tilt-shift Lenses Rumor
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A new rumor surfaced, and it is about the Canon EOS R1. Nothing to write home about, though, and no reason to take it without a massive amount of salt.

Besides suggesting the EOS R1 will launch in 2024 (yes, now it is 2024), the source of the rumor suggests the Electronic View Finder of the EOS R1 might have these specifications:

  • 7.x million dots
  • 0.7 inch OLED
  • 60 – 240hz refresh rate
  • Variable refresh rate possible
  • 4000nit brightness
  • Blackout free

All good and nice, and maybe also some educated speculation. As I told many times before, rumor sites know nothing, they just speculate. The only ones who leak serious stuff are a handful of Japanese sites.

Forget rumors, enjoy life and snap pictures.

[via camera insider]

Nikon Z 8 vs Sony a7R V, A Battle of Mirrorless ALL-STARS?

Nikon Z 8
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DPReview’s Chris, now employed at PetaPixel, posted a video where he compares the Nikon Z 8 with the Sony a7R V. Mirrorless all-stars? I doubt so.

Chris seems to have forgotten Canon’s rich offering on mirrorless cameras. While the Nikon Z 8 is a great camera (and the Sony seems to be too), we have an EOS R5 and EOS R3. Not all-stars? Enjoy the video.