Here is a Canon patent application for a zoom lens for the Canon EOS R full frame mirrorless system.

This Canon patent application (2019-211513) discusses the optical formula for an RF 17-72mm f/3.5-5.8 lens.

• Zoom ratio: 4.25
• Focal length: 17.10 34.82 72.70 mm
• F number: 3.57 4.18 5.85
• Half angle of view: 51.68 31.85 16.57
• Image height: 21.64 21.64 21.64 mm
• Lens length: 151.00 135.57 157.71 mm
• Back focus: 13.13 27.81 63.49 mm

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

• 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 Hi Lows Note]