WILD WIDE

Combining the 14mm ultra-wide focal length with a fast aperture of f/1.4 is a challenge for optical engineers, but a great result for photographers.

PAUL BURROWS

ON TRIAL SIGMA Even with the extra freedoms derived from the mirrorlss camera configuration and the availability of in-camera correction processing, there are optical designs that remain challenging. One of them is combining an ultra-wide focal length with an ultra-fast maximum aperture… say 14mm and f/1.4. There's already a 14mm f/1.8 ultra-wide prime from Sigma which was originally designed for DSLRs, but is now also available in the FE and L mirrorless mounts. The Sigma 14mm f/1.4 is a mirrorless era creation so it's two-thirds of a stop faster and takes over the crown as the fastest ultra-wide prime for full frame sensors. At f/1.4 there's 1.6x more light entering the lens than at f/1.8. To add to the design challenges, Sigma has optimised the 14mm f/1.4’s optics for astrophotography which…

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Camera (Digital) - 1 Issue, Issue 426

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