Canon has filed a new patent in Japan. The patent application describes an EF 58mm f/1.4 lens (JP 2018-97240) for full frame DSLR with a controllable soft-focus value.
This will be a specialized lens for such needs as portraiture, street, event / wedding photography and astrophotography. The fast aperture of f/1.4 and a complex optical formula would also be ideal for low-light photography needs.
The 58mm lens will feature an aperture range from f/1.4 to f/16 and a rounded 9-blade diaphragm for producing pleasing out-of-focus elements, or bokeh. If we see this lens in mass production in near future, it will compete against Nikon’s AF-S NIKKOR 58mm f/1.4G lens.
Canon EF 58mm f/1.4 Lens Patent
A first arrangement state by which said 1st focus group and said 2nd focus group are arranged so that it will be in a focusing state in the predetermined object distance and a first aberration amount may be generated.
A second arrangement state by which said 1st focus group and said 2nd focus group are arranged so that a second aberration amount which will be in a focusing state in the aforementioned predetermined object distance, and is different from said first aberration amount may be generated.
- Focal length: 57.58mm
- F number: 1.43
- Half angle of view: 20.60
- Image height: 21.64mm
- Lens length: 160.04mm
- Back focus: 40.43mm