Sigma 40mm F1.4 DG HSM Art

Those familiar with Sigma's Art series will know there's a wide range of excellent fast primes for full-frame cameras, covering focal lengths as wide as14mm right through to135mm. Some have a maximum aperture of f/1.8 or f/2.8, but many are f/1.4, of which there are some standout examples. The 35mm F1.4 DG HSM Art and 50mm F1.4 DG HSM Art are hugely popular, but now there's a new addition in the form of the 40mm F1.4 DG HSM Art that nestles in between the two. You might well ask why is there a need for a new 40mm f/1.4 when Sigma already produces such good examples of 35mm and 50mm lenses? It turns out that the 40mm focal length has long been popular with cinematographers,