Canon Patent: 24mm F1.4, 35mm F1.4 And 50mm F1.4

Canon Patent

And yet another Canon patent application. Fast primes for the RF mount.

Canon patent application 2022024113 (japan, published 8/30/2023) discusses optical formulas for three fast prime lenses:

  • 24mm F1.4
  • 35mm F1.4
  • 50mm F1.4

From the patent literature:

Optical system and imaging device

A compact optical system capable of high-speed focusing with a wide angle of view and a large aperture ratio is provided.

Description of the Related Art

Imaging devices using solid-state imaging devices such as CCD sensors and CMOS sensors are required to have optical systems that have a wide angle of view, a large aperture ratio, a small size, and high optical performance. There is also a demand for high-speed autofocus in the optical system.

An optical system with a wide angle of view and a large aperture ratio has the problem that it is difficult to correct various aberrations. In particular, if the weight of the focus lens group is reduced in order to perform high-speed focusing (autofocus), it becomes difficult to suppress aberration fluctuations in focusing from an object at infinity to a close object.

According to the present invention, it is possible to provide a compact optical system capable of high-speed focusing while having a wide angle of view and a large aperture ratio.

Example 1 (24mm F1.4)

  • Focal length 24.36
  • F value 1.44
  • Half angle of view 41.61
  • Image height 21.64
  • Lens length 106.56
  • Back focus 12.72

Example 2 (35mm F1.4)

  • Focal length 34.09
  • F value 1.45
  • Half angle of view 32.40
  • Image height 21.64
  • Lens length 113.84
  • Back focus 13.67

Example 3 (50mm F1.4)

  • Focal length 48.50
  • F value 1.45
  • Half angle of view 24.04
  • Image height 21.64
  • Lens length 108.70
  • Back focus 11.47

More Canon patents are listed here.

[via Digicame Info]

Canon Patent: 35mm f/1.3 Lens With Very Short Back Focus

Canon Patent

A new Canon patent was spotted. Will this lens ever hit the shelves? Unlikely in our opinion.

Canon patent application 2023077336 (Japan, published 6/5/23) discusses optical formulas for a 35mm f/1.3 lens.

An object of the present invention is to realize an optical system capable of reducing ghosts in a desired wavelength region in spite of having a large aperture and a small lens.

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to an optical system and the like, and is suitable for imaging apparatuses such as digital video cameras, digital still cameras, broadcast cameras, surveillance cameras, cameras for wearable devices, and cameras for mobile devices.

2. Description of the Related Art
There is a demand for a high-performance optical system that reduces the occurrence of ghosts and flares. In order to reduce the occurrence of ghosts and flares, a method of providing an antireflection film on the lens surface is known.
In recent years, optical systems have become larger in diameter and smaller in size, and the opening angle of lenses tends to increase. However, due to problems in manufacturing the antireflection film, the antireflection effect in the periphery of the lens with a large opening angle may be inferior to the antireflection effect in the position on the optical axis.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide an optical system capable of reducing ghosts, particularly in a desired wavelength region, while having a large aperture and a small lens.

Example 1

  • Focal length: 12.40
  • F-value: 1.30
  • Half angle of view: 32.82
  • Image height: 8.00
  • Overall length: 21.76
  • Back focus: 0.44

Example 2

  • Focal Length: 33.53
  • F-value: 1.30
  • Half angle of view: 32.83
  • Image height: 21.64
  • Overall length: 61.97
  • Back focus: 0.29

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

Three New Wide Angle L-tier RF-mount Prime Lenses Coming First Half 2023?

Nab 2023 Canon Eos R5 Mark Ii Canon Eos R8 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

A new Canon rumor concerning RF-mount lenses. Three of them, all primes.

Latest murmuring has it that Canon might release three wide angle “L” lenses for the RF-mount. Says the source of the rumor (emphasis mine):

[…] Canon actually plans to launch 3 wide angle L prime lenses from the RF mount in the first half of 2023. One of the lenses will be the RF 35mm f/1.2L (or f/1.4) and an RF 24mm f/1.4L USM. The third lens is unknown at this time, though [it might be] an L 28mm prime lens

The RF 35mm f/1.2L is rumored since a long time. No surprise since it is a lens Canon will release for sure, sooner or later. All three lenses will for sure be announced sooner or later. Maybe it will happen in the first half of 2023.

Stay tuned.

Source: Canon Rumors

Today Only: Lensbaby Pro Kit for Canon EF – $799.95 (reg. $1399.95)

Lensbaby

Only for today (12/07/2022) B&H Photo has a whooping $600 discount on the Lensbaby Pro Kit for Canon EF mounts.

At a glance:

  • Velvet 85mm f/1.8 Lens
  • Burnside 35mm f/2.8 Lens
  • Twist 60mm f/2.5 Lens
  • Nanuk 910 Hard Case

Get the Lensbaby Pro Kit for Canon EF on sale at $799.95. Compare at $1,399.95. Find a description of the included lenses after the break.

More selected deals:

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YONGNUO Might Release Lenses For Canon Cameras, Rumor Has It

YONGNUO

Interesting Canon rumor coming from Asia. YONGNUO might be set to soon release a lens for the Canon RF mount.

An image shared by CameraBeta shows EXIF information suggesting a YN35mm F1.4 UWM was used on a Canon EOS R6 body (see image above). Interesting.

While this would be one of the very few third party lens for the RF mount. However, if it is an autofocus lens (it seems) then the question is how Yongnuo has solved the patent infringement issues Canon already raised with Viltrox.

Let me know what your thoughts are.

[via asobinet]

Today Only: Mitakon Speedmaster 35mm f/0.95 Mark II (EF-M) – $369 (reg. $599)

Speedmaster 35mm F/0.95

Only for today (10/28/2022) B&H Photo has a $230 discount Mitakon Zhongyi Speedmaster 35mm f/0.95 Mark II for Canon EF-M mounts.

At a glance:

  • Canon EF-M Mount/APS-C Format
  • 56mm (35mm Equivalent)
  • Aperture Range: f/0.95 to f/16
  • One Extra-Low Dispersion Element
  • Two Extra-High Refractive Index Elements
  • Three High Refractive Index Elements
  • Manual Focus Design
  • De-Clicked Aperture Ring
  • Depth of Field and Distance Scales
  • Nine-Blade Diaphragm

Get the Mitakon Zhongyi Speedmaster 35mm f/0.95 Mark II on sale at $369. Compare at $599. Black and silver versions available.

More selected deals:

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