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It looks like Sigma is developing a competitor to one of my favourite Canon lenses, the EF 200mm f/2L IS. This is one of those lenses that once you try one, you never want to put it down. It's a very versatile focal length and is especially magical for portrait work.
Patent Publication No. 2016-45314 (Google Translated)
- Published 2016.4.4
- Filing date 2014.8.21
Sigma 200mm f/2 DG OS
- 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
Sigma 1.4x TC
- 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
Along with the optical formula patent for a 200mm f/2 OS, it looks like Sigma is developing a dedicated 1.4x teleconverter for the lens.
