Canon Patent: RF 100-400mm f/5.0-7.1, RF 100-300mm f/5.6-8.2

Here is another Canon patent application, as usual spotted by asobinet.com. Two more RF-mount lenses are discussed.

The Canon patent application discusses optical formulas for RF 100-400mm f/5.0-7.1, RF 100-300mm f/5.6-8.2 and RF-S 55-250mm f/4.5-7.1 lenses. Note that the last one has an “RF-S”.

The RF 100-400mm f/5.0-7.1 and RF 100-300mm f/5.6-8.2 seem to be inexpensive telephoto lenses for a full frame mirrorless camera, i.e. the EOS R. The RF-S 55-250mm f/4.5-7.1 is clearly designed for an APS-C sensor, according to asobinet.com. Hence, it might be for the EOS M system, or for the fabled EOS R with crop sensor.

Embodiment 1:

• Wide-angle intermediate telephoto
• Focal length 103.00 200.00 388.50
• F number 5.00 6.26 7.10
• Half angle of view (degrees) 11.86 6.17 3.19
• Image height 21.64 21.64 21.64
• Lens overall length 215.58 255.38 293.58
• BF 38.40 58.61 78.01

Embodiment 2:

• Wide-angle intermediate telephoto
• Focal length 103.01 200.00 388.50
• F number 5.00 6.45 7.10
• Half angle of view (degrees) 11.86 6.17 3.19
• Image height 21.64 21.64 21.64
• Lens overall length 207.99 243.96 285.99
• BF 45.82 78.95 112.66

Embodiment 3:

• Wide-angle intermediate telephoto
• Focal length 103.00 200.00 388.48
• F number 5.18 6.70 8.24
• Half angle of view (degrees) 11.86 6.17 3.19
• Image height 21.64 21.64 21.64
• Lens overall length 203.50 243.44 273.50
• BF 41.10 76.59 114.00

Embodiment 4 (for APS-C sensor):

• Wide-angle intermediate telephoto
• Focal length 56.66 120.00 242.50
• F number 4.66 6.45 7.10
• Half angle of view (degrees) 13.55 6.49 3.22
• Image height 13.66 13.66 13.66
• Lens overall length 129.73 155.54 184.73
• BF 19.19 43.59 64.21

Ideas and comments are welcome.

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

• 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