The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 16-35mm f4L IS USM and the Sigma 15mm F2.8 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. Canon 16-35mm f4L IS USM is the longer of the two lenses at 113mm. The Sigma 15mm F2.8 EX DG Fisheye with a length of 65mm, is 48mm shorter. Besides being longer, the Canon 16-35mm f4L IS USM also has a larger diameter of 83mm compared to the Sigma 15mm F2.8 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 15mm F2.8 EX DG Fisheye weighs 370g, 39% (245g) lighter than the Canon 16-35mm f4L IS USM's weight of 615g.
Lens Mounts
Both the Canon 16-35mm f4L IS USM and the Sigma 15mm F2.8 EX DG Fisheye has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K.
Sigma 15mm F2.8 EX DG Fisheye is also available in Nikon F (FX) , Pentax KAF, Sony Alpha and Sigma SA mounts.
Focal Range
Canon 16-35mm f4L IS USM has a focal range of 16-35mm and
2.2X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
25.6 - 56mm.
On the other hand, the Sigma 15mm F2.8 EX DG Fisheye is a prime lens with fixed focal lenght of 15mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 24mm.
