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Firmware Update

Sigma Patent 400MM F2.8 OS Sport

Sigma is always active to develop innovative sensor and lens for its users, this time we have seen a Sigma patent that tell us that Sigma is working in a 400mm F2.8 OS Lens, take a look at the patent details below…

Patent Publication No. 2015-64436 (Google Translated)

Published 2015.4.9
Filing date 2013.9.4
Example 1

Focal length 390.00mm
Fno. 2.91
Total angle of view 2ω 6.29 °
Image height Y 21.63mm
Overall length of the lens 353.00mm
Positive, positive positive and negative negative 5-group configuration
Inner Focus (fourth group)
Anti-vibration (part of the fifth group)

src – egami

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