Sigma A 20 mm f/1.4 DG DN – first impressions and sample images - Introduction

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Sigma A 20 mm f/1.4 DG DN – first impressions and sample images

8 August 2022

Maciej Latałło

1. Introduction

Full frame 20 mm lenses have been present on the market for many years; still, more often than not they offer you an aperture only as fast as f/2.8 or so. The era of faster instruments of this class started near the very end of 20th century - in December 2000 the Japanese Sigma company showed the 20 mm f/1.8 EX DG ASPHERICAL RF model.

The next serious move in this class of equipment we saw only in September 2008 when Leica presented the Summilux-M 21 mm f/1.4 ASPH. The aperture fastness was better but also the focal length increased so the construction was a tad easier to produce – after all an increase of the focal length by 1 mm reduces the field of view by almost three degrees.

The answer of Sigma came in 2015, when they launched the A 20 mm f/1.4 DG HSM, designed for reflex cameras.

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Sigma A 20 mm f/1.4 DG DN – first impressions and sample images - Introduction

For some time they have been offering that model also as a mirrorless variant without changing its optical construction; it was enough you add an integral extention with an appropriate mount.

A version dedicated for mirrorless cameras appeared only on 8th August 2022 when Sigma presented two very fast wide-angle lenses, the 1.4/20 and the 1.4/24. We were sent pre-production models of these lenses before their official launch so now we can share with our Readers our hands-on impression and sample shots galleries – enjoy!