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Canon Patent Application: Apodization Lenses for EF and RF
This patent application contains a series of embodiments for both EF and RF mount systems.
It sounds like this patent application deals when using an apodization filter and maintaining an even uniformity of light at different wavelengths - which translates to me as being no color cast when using an apodization filter. In the above diagram, surface areas (10) have the layers added for the apodization effect.
The patent covers a few lens embodiments as listed below.
Canon EF 50mm F1.4
focal length 52.13
F number 1.45
Angle [degree] 22.54
Image height 21.64
Lens total length 85.51
BF 37.71
Canon EF 24mm F1.4
Focal length 24.55
F number 1.45
Angle [degree] 41.39
Image height 21.64
Lens total length 119.13
BF 38.01
Canon RF 130mm F1.4
focal length 131.00
F number 1.41
Angle [degree] 9.38
Image height 21.64
Lens total length 182.28
BF 13.87
Japan Patent Application 2021-196547
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