Sigma offers a trio of fast wide angle lenses, featuring focal lengths of 20, 24 and 28 mm. All three lenses share a maximum aperture of f/1.8 and a very short minimum focus distance, which allows for interesting and often dramatic perspectives of close subjects.
In this review we'll have a look at how the 24mm lens performs on our current FX test camera, the Nikon D3x. Due to the similarities of the lenses, the three reviews share large portions of text.