A new Canon patent surfaced over the web that shows Canon is working on 20-45mm Fullframe lens with F2.8-4.0 aperture.
Take a look at the patent details below. (translated by google)
- Patent Publication No. 2015-197593
- Published 2015.11.9
- Filing date 2014.4.1
- Example
- Zoom ratio 2.25
- Focal length f = 20.00 23.60 45.00
- Fno. 2.75 2.90 4.16
- Half angle of 47.25 42.51 25.68
- Image height 21.64 21.64 21.64
- Overall length 158.28 156.32 173.36
- BF 42.05 46.10 73.14
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