According to the Egami Blog, Sigma has filed a patent for a 120-600mm f/5-6.3 optical design which could indicate that the current 150-600mm Sports and/or Contemporary models may receive an even larger focal range when replaced.
Description of Patent
Patent Publication No. 2015-203827
- Published 2015.11.16
- Filing date 2014.4.16
Example:
- Zoom ratio 4.66
- Focal length 125.15 250.18 583.80
- F number 4.86 5.84 6.50
- Total angle of view 2? 19.47 9.76 4.18
- The image height Y 21.63
- Overall length of the lens 314.20 371.31 424.96
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