Sigma has just filed a new patent for 11-22mm F4.5-5.6 lens. This is an ultra wide zoom lens for Canon, Nikon full-frame DSLRs.
Patent Publication No. 2015-203734
- Published 2015.11.16
- Filing date 2014.4.11
Example 1
- Focal length f=11.33 15.33 21.30
- Fno.=4.50 5.00 5.86
- Total angle of view ω=126.85 108.80 87.93
- Image height Y= 21.63 21.63 21.63
- Zoom ratio: 2
- Total length 163.42 156.24 156.59
Source: EGI
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