Canon Patent: RF 17-60mm, 17-70mm, 17-85mm, all f/4-5.6

Here is a new Canon patent application for RF mount lenses.

Canon patent application 2021-182053 (Japan, spotted by Hi Lows Note) discusses optical formulas for the following lenses: RF 17-60mm f/4-5.6, 17-70mm f/4-5.6 and 17-85mm f/4-5.6.

Embodiment 1

• Focal length (mm): 17.50 28.00 58.00
• F number: 4.10 4.50 5.70
• Half angle of view (degree): 51.50 38.16 20.77
• Maximum image height (mm): 22.00 22.00 22.00
• Image height (mm): 19.47 20.98 21.94
• Lens length (mm): 108.50 114.27 158.50
• BF (mm): 21.38 33.45 49.01

Embodiment 2

• Focal length (mm): 17.50 35.00 68.00
• F number: 4.10 4.50 5.70
• Half angle of view (degree): 51.50 32.15 17.93
• Maximum image height (mm): 22.00 22.00 22.00
• Image height (mm): 19.43 21.75 22.10
• Lens length (mm): 123.50 130.13 173.50
• BF (mm): 18.27 33.13 42.65

Embodiment 3

• Focal length (mm): 17.50 40.00 83.50
• F number: 4.10 4.50 5.70
• Half angle of view (degree): 51.50 28.81 14.76
• Maximum image height (mm): 22.00 22.00 22.00
• Image height (mm): 19.43 22.05 22.41
• Lens length (mm): 130.50 135.64 183.50
• BF (mm): 14.89 34.26 43.12

Embodiment 4

• Focal length (mm): 17.50 35.00 68.00
• F number: 4.10 4.50 5.70
• Half angle of view (degree): 51.50 32.15 17.93
• Maximum image height (mm): 22.00 22.00 22.00
• Image height (mm): 19.39 21.53 22.27
• Lens length (mm): 126.50 125.61 176.50
• BF (mm): 14.57 27.63 38.40

Don’t think these lenses will ever go into production.

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

• 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