The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 15mm f1.4 DG DN Art and the Sigma 8mm F3.5 EX DG Fisheye for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Sigma 15mm f1.4 DG DN Art is the longer of the two lenses at 160mm. The Sigma 8mm F3.5 EX DG Fisheye with a length of 69mm, is 91mm shorter. Besides being longer, the Sigma 15mm f1.4 DG DN Art also has a larger diameter of 104mm compared to the Sigma 8mm F3.5 EX DG Fisheye's 74mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Sigma 8mm F3.5 EX DG Fisheye weighs 400g, 70% (960g) lighter than the Sigma 15mm f1.4 DG DN Art's weight of 1360g.
Lens Mounts
The Sigma 15mm f1.4 DG DN Art has the Sony E lens mount whereas the Sigma 8mm F3.5 EX DG Fisheye has the Sigma SA lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Sigma Quattro, Sigma Quattro H and Sigma SD1 Merrill for the Sigma SA Mount.
Sigma 15mm f1.4 DG DN Art is also available in the Leica L mount.
Sigma 8mm F3.5 EX DG Fisheye is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
Sigma 15mm f1.4 DG DN Art is a prime lens with fixed focal lenght of 15mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
22.5mm.
On the other hand, the Sigma 8mm F3.5 EX DG Fisheye is a prime lens with fixed focal lenght of 8mm.
