The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon AF-S Fisheye 8-15mm F3.5-4.5 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. Nikon AF-S Fisheye 8-15mm F3.5-4.5 is the longer of the two lenses at 83mm. The Sigma 8mm F3.5 EX DG Fisheye with a length of 69mm, is 14mm shorter. Besides being longer, the Nikon AF-S Fisheye 8-15mm F3.5-4.5 also has a larger diameter of 78mm 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, 17% (85g) lighter than the Nikon AF-S Fisheye 8-15mm F3.5-4.5's weight of 485g.
Lens Mounts
Both the Nikon AF-S Fisheye 8-15mm F3.5-4.5 and the Sigma 8mm F3.5 EX DG Fisheye has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Sigma 8mm F3.5 EX DG Fisheye is also available in Canon EF and Sigma SA mounts.
Focal Range
Nikon AF-S Fisheye 8-15mm F3.5-4.5 has a focal range of 8-15mm and
1.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
12 - 22.5mm.
On the other hand, the Sigma 8mm F3.5 EX DG Fisheye is a prime lens with fixed focal lenght of 8mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 12mm.
