focal length explanation.

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Hi
I have a sony nex with the 16-50 lens. I want to buy a sigma 30mm for my camera but i am confused about the focal length. The lens description says " The Sigma 30mm F2.8 DN has been redesigned with a metal exterior under the Art category, this high-performance standard lens is designed exclusively for mirrorless interchangeable lens cameras and has the equivalent angle of view as a 45mm (35mm equivalent focal length) on the E-mount system."
Does it mean it will be the same as 30mm on my current 16-50? Or the same as 45mm on my current 16-50?
Please help me decode this.
 
Hi
I have a sony nex with the 16-50 lens. I want to buy a sigma 30mm for my camera but i am confused about the focal length. The lens description says " The Sigma 30mm F2.8 DN has been redesigned with a metal exterior under the Art category, this high-performance standard lens is designed exclusively for mirrorless interchangeable lens cameras and has the equivalent angle of view as a 45mm (35mm equivalent focal length) on the E-mount system."
Does it mean it will be the same as 30mm on my current 16-50? Or the same as 45mm on my current 16-50?
Please help me decode this.

Yup. Exactly the same :D They're just saying it gives a FF (Full frame...as in old 35mm cameras) equivalent focal length of 45mm which is exactly the same as if you'd set your 16-50 to 30mm.

The advantages the Sigma offers are a wider aperture of f2.8 and the fact that it's quite a nice sharp lens :D
 
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