Sigma has just announced
its new 18-35mm f/1.8 lens—the world's first ever lens to offer a fixed
f/1.8 aperture throughout its zoom range. This thing will stalk light
like you would not believe.
Designed for DSLRs with APS-C sized
sensors, this lens is the first to achieve a maximum aperture of f/1.8
throughout its zoom range. In the past the widest aperture a zoom lens
has been capable of achieving has been f/2.8—in contrast, this Sigma
lens offers more than a stop of extra light.
The upshot? While
people have often had to carry a prime lens to achieve f/1.8 in the
past, now that kind of light gobbling should be possible with a single
lens. Indeed, Sigma claims that it's been designed as a standard,
everyday lens.
Sigma admits that producing the lens was
tough—development was fraught with issues of distortions and
aberrations—but it clearly got there. Elsewhere, there's internal
focusing and zooming, a special Super Multi-Layer Coating to reduce
flare, and a minimum focusing distance of 28cm. No word yet on pricing
or availability yet—but it probably won't come cheap. Via: TechRadar
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