Patent of Sigma 17-55mm f/2.8 OS Lens

 

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embodiment3: 17-55mm f/2.8 OS

A new patent of the Sigma APS-C zoom 17-55mm f/2.8 OS lens has made an appearance.

 

Sigma 17-55mm f/2.8 OS
Patent Filing Date 03/29/2013
Zoom Ratio 3.14
Zoom Length 17.52-30.00-54.94
Fnumber 2.92
Angle of View 80.06-50.16-28.52
Image Height Y 14.20mm
Focusing Mechanism Inner

 

Source: Eg

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