And yet another Canon patent for RF mount lenses: a macro lens with variable soft focus.

Canon patent application P2021-47297A (Japan) discusses optical designs for a macro lens with soft focus for a full frame mirrorless camera, hence we guess for the EOS R system. The patent was spotted by the guys who spot most of the Canon patents you hear of: Hi Lows Note.

Embodiment 1

• Magnification: -1.00E-06 -0.5 -1.4
• Focal length: 100.81 65.87 36.01 mm
• Ｆ number: 2.92 4.49 6.64
• Image height: 21.64 21.64 21.64 mm
• Lens length: 162.37 162.37 162.37 mm
• BF: 14.66 14.66 14.66 mm

Embodiment 2

• Magnification: -1.00E-06 -0.5 -1.4
• Focal length: 103.01 67.67 37.04 mm
• Ｆ number: 3.04 2.6 1.45
• Image height: 21.64 21.64 21.64 mm
• Lens length: 141.34 141.34 141.34 mm
• BF: 14.70 14.70 14.70 mm

Embodiment 3

• Magnification: -1.00E-06 -0.5 -1.4
• Focal length: 103.02 67.96 37.17 mm
• Ｆ number: 2.92 4.49 6.64
• Image height: 21.64 21.64 21.64 mm
• Lens length: 138.89 138.89 138.89 mm
• BF: 14.70 14.70 14.70 mm

More Canon patents are listed here.