Canon has filed a patent spotted by Canon News for a variety of soft focus lenses. The most interesting of the bunch is a 70-200 f/4 full frame lens with a backfocus of 25mm, meaning it's not an EF mount lens.
35mm f/1.8 full frame EF Canon mount
- Focal Length 33.75
- F-Number 1.72
- Image Height 21.64
- Total Lens Length 132.93
- BF 39.14
58mm f/1.4 full frame EF Canon mount
- Focal Length 57.57
- F-Number 1.43
- Image Height 21.64
- Total Lens Length 160.04
- BF 40.43
105mm f/2.0 full frame EF Canon mount
- Focal 103.2
- F-Number 2.17
- Image Height 21.64
- Total Lens Length 123.79
- BF 42.2
70-200 f/4 full frame BF of 25mm (not EF mount)
- Focal 72.21 – 194.06
- F-Number 4.00
- Image Height: 21.64
- BF 25.98
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