New Patent: Canon RF 90mm f/2.8L IS Macro Lens

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Canon has filed a new patent for RF 90mm f/2.8L IS Macro Lens, which is designed for Canon EOS R system. Japan Patent Application 2018-205435 shows two different optical formulas. Take a look at the patent details below:

Specification and lens arrangement of embodiment 1
Focal length: 97.00 mm
F number: 2.92
Half angle of view: 12.57
Image height: 21.64 mm
Lens length: 115.12 mm
Back focus: 20.01 mm

Specification and lens arrangement of embodiment 3
Focal length: 86.00 mm
F number: 2.87
Half angle of view: 14.12
Image height: 21.64 mm
Lens length: 115.07 mm
Back focus: 15.93 mm

Via: Hi-lows-note