Canon Patent: RF-S 16-55mm f/2.8 & RF 28-70mm f/2.8 Lenses

A new Canon patent application suggests there might be some truth to the rumor about an EOS R model with APS-C sensor.

Canon patent application 2022-18006 (Japan) discusses optical formulas for an RF-S 16-55mm f/2.8 lens for crop sensor, and RF 28-70mm f/2.8 lens for full-frame sensors.

Example 1

• Focal length: 16.50-53.81
• F value: 2.90
• Half angle of view: 42.26-13.98
• Image height: 14.00
• Overall length: 103.55-129.89
• Back focus: 14.18-10.01

Example 3

• Focal length: 24.97-232.79
• F value: 4.12-6.40
• Half angle of view: 41.55-5.03
• Image height: 19.45-21.64
• Overall length: 140.70-210.70
• Back focus: 12.99-52.16

Example 4

• Focal length: 28.84-67.79
• F value: 2.90
• Half angle of view: 34.71-16.22
• Image height: 19.00-21.64
• Overall length: 141.90-158.37
• Back focus: 12.51-27.26

The patent application was spotted by asobinet.com. 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