Sigma Japan has just filed a new lens patent on Sigma 200mm f/2 DG OS HSM Sports lens. And Sigma also filed a TELE CONVERTER 1.4x for Sigma lenses. Canon and Nikon both has their 200mm f/2 lenses, both cost $5,699, the Sigma 200mm f/2 DG OS HSM lens could be much cheaper.
- Patent Publication No. 2016-45314
- Published 2016.4.4
- Filing date 2014.8.21
- The master lens
- Focal length 194.93
- F-number 2.05
- Full angle of view 2ω 12.70
- The image height Y 21.63
- Overall length of the lens 231.33
- BF 60.2233
- Complex lens
- Focal length 274.52
- F-number 2.89
- Full angle of view 2ω 9.06
- The image height Y 21.63
- Overall length of the lens 252.18
- BF 39.5088
via: EG
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