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Canon Patent Application: Canon RF 35mm F1.4L Soft Focus
Canon has applied for a patent for an RF mount 35mm F1.4 Soft focus lens.
It's a complex lens with the following characteristics;
Focal length 35.91 35.82 36.00 (normal focus, under and over)
F-NUMBER 1.52 1.52 1.53
Half angle of view 31.07 31.13 31.01
Image height 21.64 21.64 21.64
Total lens length 133.70 133.68 133.69
BF 19.05 19.03 19.04
From the patent application,
A lens system of the disclosure is a lens system which is disposed on the image side of an image pickup optical system and has a negative refractive power. The lens system includes, in order from an object side to the image side, a first lens unit having a positive refractive power, a second lens unit, and a third lens unit. The first lens unit consists of a single lens or a cemented lens. The second lens unit is configured to move in a direction of an optical axis to change a spherical aberration.
US Patent Application 20190361228
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