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 Olympus ED 8mm F1.8 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 158mm. The Olympus ED 8mm F1.8 Fisheye with a length of 80mm, is 78mm shorter. Besides being longer, the Sigma 15mm f1.4 DG DN Art also has a larger diameter of 104mm compared to the Olympus ED 8mm F1.8 Fisheye's 62mm diameter.
Below you can find a scaled side-by-side image of Sigma 15mm f1.4 DG DN Art and Olympus ED 8mm F1.8 Fisheye to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 15mm f1.4 DG DN Art and the Olympus ED 8mm F1.8 Fisheye Size and Weight 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. Olympus ED 8mm F1.8 Fisheye weighs 314g, 76% (1046g) 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 Leica L lens mount whereas the Olympus ED 8mm F1.8 Fisheye has the Micro Four Thirds lens mount . Some of the latest released cameras that are compatible with these mounts are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and OM System OM-3 Astro , OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount.
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 Olympus ED 8mm F1.8 Fisheye is a prime lens with fixed focal lenght of 8mm which has an effective (full-frame 35mm equivalent) focal range of 16mm when used on a FourThirds format camera.
