The Sigma 18-35mm f/1.8 DC HSM is the only lens of its kind on the market but is it one of the best f/1.8 lenses? Does it produce high quality images at all focal lengths and all apertures? David Hay has the review
When I first heard a rumour that a new f/1.8 zoom lens was going to be introduced, I assumed it was a hoax. In the whole history of photography, nobody had managed to make one so far. However, when Sigma announced the lens was actually on its way, I felt sure that it would need to be stopped down at least a couple of stops from full aperture to achieve sharpness across the frame. I had previously used f/1.8 and f/1.2 prime lenses that had been pretty soft at full aperture, especially towards the edges. So, what was this new Sigma zoom lens going to be like, especially at full aperture?
Most people probably think of Sigma as a lens maker who manufactures alternative lenses for major camera bodies, but at a lower cost. They also have a premium lens range, the EX series, which...
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