The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica SL 100mm F2.8 and the Sigma 70-200mm f2.8 Sports 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 70-200mm f2.8 Sports is the longer of the two lenses at 205mm. The Leica SL 100mm F2.8 with a length of 137mm, is 68mm shorter. Besides being longer, the Sigma 70-200mm f2.8 Sports also has a larger diameter of 91mm compared to the Leica SL 100mm F2.8's 77mm 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. Leica SL 100mm F2.8 weighs 801g, which means it is 544g (40%) lighter than the Sigma 70-200mm f2.8 Sports which has a weight of 1345g.
Filter Threads
The Leica SL 100mm F2.8 has a filter size of 67mm whereas the Sigma 70-200mm f2.8 Sports has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Leica SL 100mm F2.8:
And these are the 77mm filters that we recommend for the Sigma 70-200mm f2.8 Sports:
Lens Mounts
Both the Leica SL 100mm F2.8 and the Sigma 70-200mm f2.8 Sports has the same Leica L lens mount. Some of the latest released cameras that are compatible with the Leica L lenses are Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE.
Sigma 70-200mm f2.8 Sports is also available in Sony E mount.
Focal Range
Leica SL 100mm F2.8 is a prime lens with fixed focal lenght of 100mm.
On the other hand, the Sigma 70-200mm f2.8 Sports has a focal range of 70-200mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 105 - 300mm.
