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

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:

• RF 16-28mm lens with either f/2.8, f/2.8-4, or f/4
• Automatic shutter silencing based on subject and distance
• A bunch of prime lenses for the RF mount
• An improved Electronic Viewfinder
• Patent application for RF 50mm F1.4 and an RF 35mm f/1.4 lenses
• A zoom lens that might be for an EOS R with APS-C sensor
• A smaller IBIS unit.
• A cooling adapter for the RF mount (R5 overheating?)
• A bunch of macro lenses for the RF mount.
• A 8mm f/4 circular fisheye lens for the Canon EOS R system
• A battery grip that works with differently siszed cameras
• A 100-400mm f/5.5-7.1 lens for APS-C cameras. EOS M or DSLR?
• RF 17-70mm lens for EOS R system
• IBIS coming to the EOS M and PowerShot lineup?
• Patent Application: mirrorless camera with large display and virtual control wheel
• Patent Application: IBIS and Lens IS Working Together
• Patent application for high speed mirror movement and control
• Patent application for an RF 14-28mm f/2 lens
• Patent application for an RF 50mm f/1.8 lens
• Patent application for a smart lens cap
• Patent application for celestial auto-focus
• Patent application describing a Pop-Up Flash With LED
• Patent application describing the optical formula for a RF 70-300mm F/4-5.6 IS lens for EOS R systems
• Patent application describing how to improve burst rate by compressing raw files
• Patent application describing a new way to review photos from a sequential shot
• Patent application that describes technology to improve wireless communication while reducing power consumption
• Patent application to spot and reduce moire artefacts in image data
• Patent application for weather sealed lens adapter
• Patent application for AI powered predictive camera control system
• Patent application for 18-55mm kit lens with LCD display
• Patent application to reduce noise in image files

[via asobinet]