Sigma 50 mm f/1.4 EX DG HSM
3. Build quality
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A big front element implies significant overall dimensions. So far, the biggest lens in the 1.4/50 class was Canon. Sigma is bigger and heavier than Canon and the Sony 1.4/50 looks simply like a dwarf next to it.
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Looking at the chart , which compares the 1.4/50 lenses parameters it is clear that Sigma differs from its competitors in other aspects too. It’s design is the most complicated and its aperture has the biggest number of blades.
The tested Sigma belongs to the highest EX class, so we have here a solid, metal barrel, a metal bayonet and a three-year-long warranty which can be extended to five years. On the lens we can find a clear distance scale behind a glass and a quite big, comfortable and precise manual focus ring. The lens ends with a non-rotating filter thread, 77 mm in diameter.
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The inner construction consists of 8 elements in 6 groups. The element the closest to the sensor has an aspherical shape. After the third element we find a round 9 diaphragm blades aperture, which can be stopped down to f/16.

As befits the EX series, we get with the lens good quality accessories – in the box we will find both caps, a petal-type lens hood and a stylish, hard case, which can be attached, for example, to a belt.
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