The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 35mm F1.4 DG DN Art and the Sigma 40mm F1.4 DG HSM A for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 40mm F1.4 DG HSM A is the longer of the two lenses at 131mm. The Sigma 35mm F1.4 DG DN Art with a length of 110mm is 21mm shorter. Besides being longer, the Sigma 40mm F1.4 DG HSM A also has a larger diameter of 88mm compared to Sigma 35mm F1.4 DG DN Art's 76mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods.
Lens Mounts
Both Sigma 35mm F1.4 DG DN Art and Sigma 40mm F1.4 DG HSM A has the same Leica L lens mount. Some of the latest released cameras that are compatible with the Leica L lenses are Panasonic S5 II, Panasonic S5 II X and Sigma fp L.
Sigma 35mm F1.4 DG DN Art is also available in Sony E mount.
Sigma 40mm F1.4 DG HSM A is also available in Canon EF , Nikon F (FX), Sigma SA and Sony E mounts.
Focal Range
Sigma 35mm F1.4 DG DN Art is a prime lens with fixed focal lenght of 35mm. Sigma 40mm F1.4 DG HSM A is a prime lens with fixed focal lenght of 40mm.