New Canon Patents for 28-70mm f/2.8 & 28-60mm f/2.8 Lenses

New Canon Patent applications filed for a set of RF mount lenses. These new lenses are the Canon RF 28-70mm f/2.8 & 28-60mm f/2.8.

Canon patent application 2022091621 (Japan) discusses optical formulas for two small and compact zoom lenses with large aperture:

  • 28-70mm f/2.8
  • 28-60mm f/2.8

Example 1

  • Focal length: 28.84-67.90
  • F value: 2.91
  • Half angle of view: 32.68-17.67
  • Image height: 18.50-21.64
  • Overall length: 138.40-105.42
  • Back focus: 10.97-21.12

Example 2

  • Focal length: 28.84-60
  • F value: 2.91
  • Half angle of view: 32.68-19.83
  • Image height: 18.50-21.64
  • Overall length: 132.38-106.85
  • Back focus: 13.47-23.82

Canon Patent: 135mm f/2, 400mm f/4 and 50mm f/2.5 defocus smoothing

New Canon Patent applications filed for a set of RF mount lenses with electronically controlled Defocus Smoothing (DS).

Defocus Smoothing is a technology Canon first introduced with the RF 85mm f/1.2L DS lens. The featured Canon patent might suggest more DS lenses are on their way.

Canon patent application 2020-199390 (Japan) discusses optical formulas and methods for three prime lenses with DS:

  • 135mm f/2
  • 400mm f/4
  • 50mm f/2.5

Continue reading “Canon Patent: 135mm f/2, 400mm f/4 and 50mm f/2.5 defocus smoothing”

New Canon Patents for RF 11-24mm f/4L and RF 8-24mm f/4L Fisheye Lenses

New Canon Patents filed for several new RF mount lens models. The patent application describes the RF 11-24mm f/4L USM wide-angle and RF 8-24mm f/4L USM fisheye lenses for Canon full-frame mirrorless cameras.

The first lens is similar as previous rumored RF 10-24mm f/4L USM lens, which is in the RF lens roadmap for a long time. The second lens is a zoom fisheye lens, this lens will work as a circular fisheye on a full-frame sensor and as a “normal” fisheye on the crop sensors found in the Canon EOS R7 and Canon EOS R10. Continue reading “New Canon Patents for RF 11-24mm f/4L and RF 8-24mm f/4L Fisheye Lenses”

Canon Patents for 35mm f/2.8, 85mm f/2.8, 130mm f/4 and 220mm f/4 Tilt-shift

Here are several new Canon Patents but this time for tilt-shift lenses with reduced composition shift. Canon has filed several new RF mount lens patents for 35mm f/2.8, 85mm f/2.8, 130mm f/4 and 220mm f/4 Tilt-shift.

A new Canon patent application discusses optical formulas and methods for tilt-shift lenses with reduced composition shift.

  • 35mm f/2.8
  • 85mm f/2.8
  • 139mm f/4
  • 220mm f/4

From the patent literature: Continue reading “Canon Patents for 35mm f/2.8, 85mm f/2.8, 130mm f/4 and 220mm f/4 Tilt-shift”

Canon Lens Patents for APS-C Mirrorless: 24mm f/1.4, 28mm f/1.4 & 35mm f/1.4

Here are several new Canon Patents but this time for APS-C Mirrorless system. Canon has filed several new RF mount APS-C mirrorless lens patents for 24mm f/1.4, 28mm f/1.4 and 35mm f/1.4 Lenses.

[Publication number] P2019090990
[Publication date] APRIL 25, 2022
[Patent application title] Optical system and imaging device Continue reading “Canon Lens Patents for APS-C Mirrorless: 24mm f/1.4, 28mm f/1.4 & 35mm f/1.4”

Canon RF Patents for 200mm f2, 300mm F2.8 & 500mm F4 Super-Telephoto Lenses

Canon filed new RF-mount lens patents for 200mm f2, 300mm F2.8 & 500mm F4 Super-Telephoto models. More details of the new Canon Patents for full-frame mirrorless cameras can be found below.

[Publication number] P2021039379
[Publication date] APRIL 25, 2022
[Patent application title] Optical system and imaging device Continue reading “Canon RF Patents for 200mm f2, 300mm F2.8 & 500mm F4 Super-Telephoto Lenses”

New Canon Patents: 16-28mm f/2.8, 15-28mm f/2.8-4 IS & 15-28mm f/4-5.6 IS Lenses

New Canon Patents filed for several new RF mount wide-angle models. The patent application describes the 16-28mm f/2.8, 15-28mm f/2.8-4 IS and 15-28mm f/4-5.6 IS Lenses for Canon full-frame mirrorless cameras.

Canon patent application 2022063727 (Japan) discusses optical formulas for three RF mount lenses:

  • RF 16-28mm f/2.8
  • RF 15-28mm f/2.8-4
  • RF 15-28mm f/4-5.6 IS

[Publication number] P2022063727
[Publication date] APRIL 22, 2022
[Patent application title] Optical system and imaging device

Continue reading “New Canon Patents: 16-28mm f/2.8, 15-28mm f/2.8-4 IS & 15-28mm f/4-5.6 IS Lenses”

New Canon Patents for RF 600mm f/4 and RF 400mm f/2.8 Super-Telephoto Lenses

Here are the new Canon Patents for RF 600mm f/4 and RF 400mm f/2.8 Super-Telephoto Lenses. Canon patent application 2022-22771 discusses optical formulas for RF mount mirrorless cameras.

See previous patent reports for lenses.

[Publication number] P2022052220
[Publication date] APRIL 4, 2022
[Patent application title] Optical system and imaging device and imaging system

Example 1 (600mm F4)
Focal length of XY cross section 575.00
Focal length of X-Z cross section 575.00
F number 4.10
Half angle of view (°) 2.15 Semi image
height 21.64
Back focus 88.87

Example 2 (400 mm F2.8)
Focal length of XY cross section 399.58 Focal length of
X-Z cross section 399.58
F number 2.90
Half angle of view (°) 3.10 Half image
height 21.64
Back focus 50.30

Canon Patents: RF 24-70mm f/2.8 & RF 28-85mm f/2-2.8 Lenses

New Canon patents filed describing 24-70mm f/2.8 and RF 28-85mm f/2-2.8 Lenses for Canon RF-mount cameras.

The lenses in the examples are all for full frame mirrorless cameras, and you can see that IS is attached from the lens configuration diagram. The 24-70mm F2.8 is a standard standard zoom, but the 28-85mm F2-2.8 has specs that we rarely see.

The total length of 28-85mm F2-2.8 is 138.5mm excluding the flange back of the RF mount, so it seems that it fits in a practical size. This will be a lens more suitable for portraits than the standard zoom of Daisangen.

[Publication number] P2019049645
[Publication date] APRIL 4, 2022
[Patent application title] Optical system and imaging device

Continue reading “Canon Patents: RF 24-70mm f/2.8 & RF 28-85mm f/2-2.8 Lenses”

New Canon Patents for 1200mm f/8, 1200mm f/11, 800mm f/5.6 Lenses

Here are several new Canon patents that have been surfaced online. Designed for the EOS R full frame mirrorless system these are some super telephoto lenses.

Canon has filed several new RF mount super-telephoto lens patents for the Canon full frame mirrorless cameras. I guess we already seen these “1200mm f/8“,  and “800mm f/5.6” lenses announced and hope to see the missing “1200mm f/11” in near future.

Canon RF 800mm f/5.6 L IS USM Lens: $16,999 at B&HAdorama.

Canon RF 1200mm f/8 L IS USM Lens: $19,999 at B&HAdorama.

Continue reading “New Canon Patents for 1200mm f/8, 1200mm f/11, 800mm f/5.6 Lenses”