An RF 52-83mm F/1.2 Lens For The EOS R Shows Up In Canon Patent

Another weird zoom range spotted in a Canon patent application.

Canon patent application 2019-138941 (Japan) describes the optical formula for a 52-83mm F/1.2 lens for full frame mirrorless systems.

Two embodiments can be found in the patent literature:

• Zoom ratio: 1.60 
• Focal length: 51.50 – 64.01 – 82.52 mm
• Fno.: 1.24
• Half angle: 22.79 – 18.67 – 14.69  
• Lens length: 201.66 – 204.48 – 204.68 mm
• Back focus: 22.89 – 23.95 – 25.47 mm 

And:

• Zoom ratio: 1.60 
• Focal length: 51.50 – 64.01 – 82.52 mm
• Fno.: 1.13
• Half angle: 22.79 – 18.67 – 14.69  
• Lens length: 220.20 – 225.05 – 224.20 mm
• Back focus: 6.51 – 6.53 – 8.64 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]